Dr.Mandar M. Lele - Academia.edu (original) (raw)

Papers by Dr.Mandar M. Lele

Mathematical Modelling of Engineering Problems

Pressure and air to fuel ratio control are extremely difficult in coal-fired grate boilers due to... more Pressure and air to fuel ratio control are extremely difficult in coal-fired grate boilers due to a significant lag in combustion. This leads to suboptimal operation of the boiler and poor efficiency of the plant. This also leads to higher level fluctuation. Fluctuation in pressure, water level and oxygen level are quite evident in the operation of coal-fired grate boilers in fluctuating load conditions. The present work aims to develop a predictive and dynamic simulation model of a coal-fired grate boiler for the prediction of pressure, and water level in fluctuating load conditions and its extension for the prediction of oxygen level. A data-driven approach has been used for the prediction of heat release, distribution of heat transfer, circulation analysis and airflow through the various dampers. This model has been integrated with the boiler dynamics model of a hybrid boiler. Errors in pressure and water level are measured for training data and the multi-objective optimisation m...

Computational Thermal Sciences: An International Journal

International journal of ambient energy, 2021

The design of Triple concentric tube heat exchanger (TCTHE) requires heat transfer coefficient (H... more The design of Triple concentric tube heat exchanger (TCTHE) requires heat transfer coefficient (HTC) values for all three fluid streams as input parameters. The fluid through intermediate tube tran...

The paper aims in improvisation of the grinding process for elastic materials like rubber, plasti... more The paper aims in improvisation of the grinding process for elastic materials like rubber, plastic, composites, metals, waxes etc. Nowadays, we find a lot of wastage of these materials. Some of them like plastic, artificial rubber composites are very much harmful for our environment. This research will basically help in cautious use of the above mentioned pollutants. For example, Thermoplastics are difficult to grind small sized particle at ambient temperature because they are soften adhere in lumpy masses and clog screens. In cryogenic grinding when thermoplastic is chilled by dry ice, liquid carbon dioxide or liquid nitrogen they can be finally grounded to powder suitable for electrostatic spraying and other powder processes. Advantages of these processes are to increase productivity through optimized particle size, elimination of caking product within the mill, increases protection from the fire and product oxidation due to inert milling atmosphere..

Heat and Mass Transfer, 2015

In the present study, an experimental investigation on thermal performance of the conical coil he... more In the present study, an experimental investigation on thermal performance of the conical coil heat exchanger with 90° conical coil heat exchanger is reported. Three different conical coil heat exchangers of same mean coil diameter (Dm = 200 mm) with different tube diameters (di = 8, 10, 12.5 mm) are analyzed under steady state condition. The analysis is carried out for the tube side hot fluid flow range of 10–100 lph (Re = 500–5,000), while the shell side flow range of 30–90 lph. The data available from experimentation leads to evaluate heat transfer coefficients for inside and outside the tube of the conical coil heat exchanger by Wilsons plot method. The calculations are further extended to estimate Nusselt Number (Nu) and effectiveness. The empirical correlations are proposed for predicting Nu and the outlet temperatures of hot and cold fluids. The predicted empirical correlations show reasonable agreement with the experimental results within the given range of parameters.

International Journal of Heat and Technology, 2020

In this present works, a generalized approach for the two-phase flow analysis of a natural circul... more In this present works, a generalized approach for the two-phase flow analysis of a natural circulation in hybrid boiler. The model uses the combination of node and loop equations and the Newton Raphson technique for the solution of the set of equations. Loop equations have been developed for each evaporator tube with the unique driving force and pressure drop of the concerned loop. Node equations are mainly developed for common risers and downcomers. A unique connectivity matrix has been used to correlate each branch flow with loop and node equations. The model is validated by a unique indirect method by comparing the actual water level and calculated water level. Experiments have been performed with uniform diameter of tubes in 53 channels circulating loop to find the volume of steam. The model shows good agreement with experimental investigations with a maximum of 3.57% absolute error. The model can be used for the design, analysis, and optimization of the natural circulation netw...

Drying is simply the process of moisture removal from a product. It can be performed by various m... more Drying is simply the process of moisture removal from a product. It can be performed by various methods. In these methods, thermal drying is most commonly used for drying agricultural products. Solar heated air could be used more effectively for drying of the various products under controlled conditions. But still today, dryers appear the most attractive option for use in rural locations. In industry solar drying system is rarely used. Though solar drying system having versatile appearance but still it has some disadvantage, which restrict its use in industry. The use of solar heat into industrial production processes (SHIP) is a challenge to both: the process engineer and the solar expert. The major share of energy which is needed in industrial production processes is below 250°C temperature level, which could be well supplied by solar thermal technologies. The lower temperature level (< 80°C) can already be provided today with commercially available solar thermal collectors. Au...

Aluminum Open cell heat exchanger with cell diameter 10mm were manufactured having base area meas... more Aluminum Open cell heat exchanger with cell diameter 10mm were manufactured having base area measuring 100mm 45mm.It is attached to the copper Plate which is heated by a cylindrical heater inserted in copper plate. Other sides of Copper base plate are insulated so that heat flow is unidirectional and pass through the cellular structure. Results of Natural Convective heat transfer in Aluminum open cell heat exchanger heated from below are presented. Samples of Regular Aluminum Open cell cellular structure with porosity ( ) having different height are used to study the effects of Geometry on heat transfer to air. Results indicate that with Aluminum open cell cellular structure attached to the copper plate the temperature of base copper plate has been considerably reduced for different heat flux in comparison with the base case when there is only copper plate heat from below with different heat flux. So the open cell cellular structure can dissipate higher amount heat for the same temp...

Emerging Trends in Computing and Expert Technology, 2019

A theoretical investigation is considered to discover possible alternatives on behalf of R134a, R... more A theoretical investigation is considered to discover possible alternatives on behalf of R134a, R12 and R22 for traditional vapor compression refrigeration system. For the same two azeotrope blends, R404A and R407C are nominated. The theoretical analysis is conceded for the refrigerating system at a continual condensation temperature of 50 ℃ and −10 ℃ to 10 ℃ evaporating temperature. Results to investigate alternative refrigerant have slightly lower performance coefficient than HFC134a, CFC22 and CFC12 respectively. Further, it is noticed the average performance coefficient of alternative refrigerants is 7.26% for R404A and 1.41% for R407C enhanced for the degree of superheating and sub cooling. The experimental setup is developed for R404A and R407C to observed different parameters such as pull down time for evaporator temperature, discharge pressure, power consumption, performance coefficient and energy efficiency ratio and compared with R134a. Smaller pull down time, lesser power...

A gas turbine works on a Brayton cycle. The efficiency of an ideal Brayton cycle depends on the c... more A gas turbine works on a Brayton cycle. The efficiency of an ideal Brayton cycle depends on the compression ratio and compression ratio is depends on the inlet temperature of the gas entering the turbine. If the inlet temperature of gas increases then the efficiency of the Brayton cycle increases. But the inlet gas temperatures has a limit due to the physical properties of the turbine blades. By sophisticated cooling technique and introduction of high temperature withstanding materials, this limitation can be overcome to a great extent. In this paper, various general types of cooling technologies used for cooling the turbine blades are explained. Also new recent types of cooling techniques for gas turbine, different new technology used in gas turbine blade material are explained with case study.

International journal of engineering research and technology, 2012

Present Experimental work shows result obtain from experimentation of heat transfer enhancement i... more Present Experimental work shows result obtain from experimentation of heat transfer enhancement in circular horizontal tube by using wavy clockwise and anticlockwise Copper twist tape inserts with working fluid is air. Experiments conducted on plain circular tube with or without tapes. During experimentation constant heat flux and different mass flow rate condition is used. The wavy clockwise and anticlockwise twist direction tape are of same pitch , varying wave width and different angle of rotation in clockwise and counter clockwise direction as 30°, 45°, 60° respectively. The Reynolds no. varied from 4000 to 11000. Heat transfer coefficient and pressure drop are calculated and results are compared with the plain tube without inserts. Finally heat transfer rate enhances with wavy clockwise and anticlockwise twist direction tape inserts as compared to plain tube varied from 12 % to 56 % with reasonable increment in pressure drop for various inserts. Plain twist tape results are als...

The heat transfer and pressure drop analysis of conical coil heat exchanger with various tube dia... more The heat transfer and pressure drop analysis of conical coil heat exchanger with various tube diameters, fluid flow rates, and cone angles is presented in this paper. Fifteen coils of cone angles 180° (horizontal spiral), 135°, 90°, 45°, and 0° (vertical helical) are fabricated and analysed with, same average coil diameter, and tube length, with three different tube diameters. The experimentation is carried out with hot and cold water of flow rate 10 to 100 L per hour (Reynolds range 500 to 5000), and 30 to 90 L per hour, respectively. The temperatures and pressure drop across the heat exchanger are recorded at different mass flow rates of cold and hot fluid. The various parameters: heat transfer coefficient, Nusselt number, effectiveness, and friction factor, are estimated using the temperature, mass flow rate, and pressure drop across the heat exchanger. The analysis indicates that, Nusselt number and friction factor are function of flow rate, tube diameter, cone angle, and curvat...

The successful development of a three degree of freedom motion simulation platform, capable of si... more The successful development of a three degree of freedom motion simulation platform, capable of simulating a car driving on road, is prepared. The motion simulation platform was developed to practically simulate and test an unmanned road vehicle’s capability of driving on a road, before practically being demonstrated on an actual. All aspects of the motion simulation platform’s development are considered, from the conceptual design to its practical implementation. The mechanical design and construction of a motion simulation platform, as well as the electronics and software to enable the operation of this motion simulation platform, are presented. Mathematical models of the process and platform orientation are developed. A controller architecture capable of regulating the process, resulted in the successful control of the motion simulation platform. Practical motion simulation results of Intelligent Motion Technology Pvt. Ltd, demonstrate the motion simulation platform’s success. The...

Wind tunnels are popularly used in testing of applications such as aerodynamics, automobiles, arc... more Wind tunnels are popularly used in testing of applications such as aerodynamics, automobiles, architects, submarine etc. A low speed wind tunnels and its type are present in this .This paper focuses on the wind tunnels and its computational solving approaches. Based on this study, the application of a wind tunnel leading to the quantative predictions have been a combination of theory and experiment. Low speed wind tunnels are about mach no =0.4, 134 m/s this paper gives the idea about various parameters and methods that used for calculation of pressure and temperature and computational methods. This review concludes that, the use of low speed wind tunnel can give the idea for improving the streamline shape of the model and by using scale model cost will be saved.

The manufacturing industry is a sector of our society which constantly faces challenges with the ... more The manufacturing industry is a sector of our society which constantly faces challenges with the variation in demand and supply. Optimization in such a dynamic environment becomes difficult for any industry. Advanced approaches constantly attempt to balance the profit of the supplier as well as contentment level of the customer. Automation in the industry assures that mass production will maintain the supply proportional to the demand. In order to take the automation to the next level, Industry 4.0 allows for a more flexible production environment by introducing the concept of digitalization through a cyber-physical system or CPS. It also becomes an attempt to keep the manufacturing sector updated with the advances in technology of this 21st Cy. This article attempts to list out the concepts of this next generation approach towards a more sustainable model of the manufacturing industry. Moreover, the research will also investigate the advantages and limitations of such a concept in ...

Computational Thermal Sciences: An International Journal

Journal of Physics: Conference Series

The basic objective of the paper is to identify the desired circulation ratio for the natural cir... more The basic objective of the paper is to identify the desired circulation ratio for the natural circulation of water tube boilers in different operating conditions. This requires the basic study of heat flux and the mode of the boiling heat transfer, and the phenomenon like departure from nucleate boiling and tube overheating. The parameters, which need to be studied are heat flux, pressure, dryness fraction, void fraction, liquid velocity and their impact on the required circulation ratio. For a natural circulation boiler, the circulation ratio is one of the most important design parameters as the other design parameter like critical heat flux and skin temperature are mainly derived from the circulation ratio. The required circulation ratio can vary with the boiler pressure, liquid velocity and maximum heat flux. This study is intended to provide input for the safe and optimum design of a natural circulation boiler.

International Journal of Engineering and Advanced Technology

The analytical study has been performed to investigate the combined effects of lid movement and b... more The analytical study has been performed to investigate the combined effects of lid movement and buoyancy force parameter on mixed convective flow in an arc-shape cavity. The dimensional analysis based on Buckingham π-Theorem is used in the present study. It results in correlations for Nusselt number in terms of non dimensionalized parameters, viz. Re, Pr, Gr, θ etc. The correlations developed are validated against the experimental data of horizontal arc- shape cavity and numerical data of inclined arc-shape cavity obtained from open literature. The correlation developed in the present study for horizontal arcshape cavity is valid for wide ranges of Re varying from 30 to 1500 and Gr from 0 to 107. In inclined arc-shape cavity it is valid for Re varying from 30 to 1500, Gr from105 to 107 and inclination angle from 150to 600.The close agreement in the comparison between predicted results by correlation developed in the present study and reported Nu correlation shows the validity of the...

Mathematical Modelling of Engineering Problems

Pressure and air to fuel ratio control are extremely difficult in coal-fired grate boilers due to... more Pressure and air to fuel ratio control are extremely difficult in coal-fired grate boilers due to a significant lag in combustion. This leads to suboptimal operation of the boiler and poor efficiency of the plant. This also leads to higher level fluctuation. Fluctuation in pressure, water level and oxygen level are quite evident in the operation of coal-fired grate boilers in fluctuating load conditions. The present work aims to develop a predictive and dynamic simulation model of a coal-fired grate boiler for the prediction of pressure, and water level in fluctuating load conditions and its extension for the prediction of oxygen level. A data-driven approach has been used for the prediction of heat release, distribution of heat transfer, circulation analysis and airflow through the various dampers. This model has been integrated with the boiler dynamics model of a hybrid boiler. Errors in pressure and water level are measured for training data and the multi-objective optimisation m...

Computational Thermal Sciences: An International Journal

International journal of ambient energy, 2021

The design of Triple concentric tube heat exchanger (TCTHE) requires heat transfer coefficient (H... more The design of Triple concentric tube heat exchanger (TCTHE) requires heat transfer coefficient (HTC) values for all three fluid streams as input parameters. The fluid through intermediate tube tran...

The paper aims in improvisation of the grinding process for elastic materials like rubber, plasti... more The paper aims in improvisation of the grinding process for elastic materials like rubber, plastic, composites, metals, waxes etc. Nowadays, we find a lot of wastage of these materials. Some of them like plastic, artificial rubber composites are very much harmful for our environment. This research will basically help in cautious use of the above mentioned pollutants. For example, Thermoplastics are difficult to grind small sized particle at ambient temperature because they are soften adhere in lumpy masses and clog screens. In cryogenic grinding when thermoplastic is chilled by dry ice, liquid carbon dioxide or liquid nitrogen they can be finally grounded to powder suitable for electrostatic spraying and other powder processes. Advantages of these processes are to increase productivity through optimized particle size, elimination of caking product within the mill, increases protection from the fire and product oxidation due to inert milling atmosphere..

Heat and Mass Transfer, 2015

In the present study, an experimental investigation on thermal performance of the conical coil he... more In the present study, an experimental investigation on thermal performance of the conical coil heat exchanger with 90° conical coil heat exchanger is reported. Three different conical coil heat exchangers of same mean coil diameter (Dm = 200 mm) with different tube diameters (di = 8, 10, 12.5 mm) are analyzed under steady state condition. The analysis is carried out for the tube side hot fluid flow range of 10–100 lph (Re = 500–5,000), while the shell side flow range of 30–90 lph. The data available from experimentation leads to evaluate heat transfer coefficients for inside and outside the tube of the conical coil heat exchanger by Wilsons plot method. The calculations are further extended to estimate Nusselt Number (Nu) and effectiveness. The empirical correlations are proposed for predicting Nu and the outlet temperatures of hot and cold fluids. The predicted empirical correlations show reasonable agreement with the experimental results within the given range of parameters.

International Journal of Heat and Technology, 2020

In this present works, a generalized approach for the two-phase flow analysis of a natural circul... more In this present works, a generalized approach for the two-phase flow analysis of a natural circulation in hybrid boiler. The model uses the combination of node and loop equations and the Newton Raphson technique for the solution of the set of equations. Loop equations have been developed for each evaporator tube with the unique driving force and pressure drop of the concerned loop. Node equations are mainly developed for common risers and downcomers. A unique connectivity matrix has been used to correlate each branch flow with loop and node equations. The model is validated by a unique indirect method by comparing the actual water level and calculated water level. Experiments have been performed with uniform diameter of tubes in 53 channels circulating loop to find the volume of steam. The model shows good agreement with experimental investigations with a maximum of 3.57% absolute error. The model can be used for the design, analysis, and optimization of the natural circulation netw...

Drying is simply the process of moisture removal from a product. It can be performed by various m... more Drying is simply the process of moisture removal from a product. It can be performed by various methods. In these methods, thermal drying is most commonly used for drying agricultural products. Solar heated air could be used more effectively for drying of the various products under controlled conditions. But still today, dryers appear the most attractive option for use in rural locations. In industry solar drying system is rarely used. Though solar drying system having versatile appearance but still it has some disadvantage, which restrict its use in industry. The use of solar heat into industrial production processes (SHIP) is a challenge to both: the process engineer and the solar expert. The major share of energy which is needed in industrial production processes is below 250°C temperature level, which could be well supplied by solar thermal technologies. The lower temperature level (< 80°C) can already be provided today with commercially available solar thermal collectors. Au...

Aluminum Open cell heat exchanger with cell diameter 10mm were manufactured having base area meas... more Aluminum Open cell heat exchanger with cell diameter 10mm were manufactured having base area measuring 100mm 45mm.It is attached to the copper Plate which is heated by a cylindrical heater inserted in copper plate. Other sides of Copper base plate are insulated so that heat flow is unidirectional and pass through the cellular structure. Results of Natural Convective heat transfer in Aluminum open cell heat exchanger heated from below are presented. Samples of Regular Aluminum Open cell cellular structure with porosity ( ) having different height are used to study the effects of Geometry on heat transfer to air. Results indicate that with Aluminum open cell cellular structure attached to the copper plate the temperature of base copper plate has been considerably reduced for different heat flux in comparison with the base case when there is only copper plate heat from below with different heat flux. So the open cell cellular structure can dissipate higher amount heat for the same temp...

Emerging Trends in Computing and Expert Technology, 2019

A theoretical investigation is considered to discover possible alternatives on behalf of R134a, R... more A theoretical investigation is considered to discover possible alternatives on behalf of R134a, R12 and R22 for traditional vapor compression refrigeration system. For the same two azeotrope blends, R404A and R407C are nominated. The theoretical analysis is conceded for the refrigerating system at a continual condensation temperature of 50 ℃ and −10 ℃ to 10 ℃ evaporating temperature. Results to investigate alternative refrigerant have slightly lower performance coefficient than HFC134a, CFC22 and CFC12 respectively. Further, it is noticed the average performance coefficient of alternative refrigerants is 7.26% for R404A and 1.41% for R407C enhanced for the degree of superheating and sub cooling. The experimental setup is developed for R404A and R407C to observed different parameters such as pull down time for evaporator temperature, discharge pressure, power consumption, performance coefficient and energy efficiency ratio and compared with R134a. Smaller pull down time, lesser power...

A gas turbine works on a Brayton cycle. The efficiency of an ideal Brayton cycle depends on the c... more A gas turbine works on a Brayton cycle. The efficiency of an ideal Brayton cycle depends on the compression ratio and compression ratio is depends on the inlet temperature of the gas entering the turbine. If the inlet temperature of gas increases then the efficiency of the Brayton cycle increases. But the inlet gas temperatures has a limit due to the physical properties of the turbine blades. By sophisticated cooling technique and introduction of high temperature withstanding materials, this limitation can be overcome to a great extent. In this paper, various general types of cooling technologies used for cooling the turbine blades are explained. Also new recent types of cooling techniques for gas turbine, different new technology used in gas turbine blade material are explained with case study.

International journal of engineering research and technology, 2012

Present Experimental work shows result obtain from experimentation of heat transfer enhancement i... more Present Experimental work shows result obtain from experimentation of heat transfer enhancement in circular horizontal tube by using wavy clockwise and anticlockwise Copper twist tape inserts with working fluid is air. Experiments conducted on plain circular tube with or without tapes. During experimentation constant heat flux and different mass flow rate condition is used. The wavy clockwise and anticlockwise twist direction tape are of same pitch , varying wave width and different angle of rotation in clockwise and counter clockwise direction as 30°, 45°, 60° respectively. The Reynolds no. varied from 4000 to 11000. Heat transfer coefficient and pressure drop are calculated and results are compared with the plain tube without inserts. Finally heat transfer rate enhances with wavy clockwise and anticlockwise twist direction tape inserts as compared to plain tube varied from 12 % to 56 % with reasonable increment in pressure drop for various inserts. Plain twist tape results are als...

The heat transfer and pressure drop analysis of conical coil heat exchanger with various tube dia... more The heat transfer and pressure drop analysis of conical coil heat exchanger with various tube diameters, fluid flow rates, and cone angles is presented in this paper. Fifteen coils of cone angles 180° (horizontal spiral), 135°, 90°, 45°, and 0° (vertical helical) are fabricated and analysed with, same average coil diameter, and tube length, with three different tube diameters. The experimentation is carried out with hot and cold water of flow rate 10 to 100 L per hour (Reynolds range 500 to 5000), and 30 to 90 L per hour, respectively. The temperatures and pressure drop across the heat exchanger are recorded at different mass flow rates of cold and hot fluid. The various parameters: heat transfer coefficient, Nusselt number, effectiveness, and friction factor, are estimated using the temperature, mass flow rate, and pressure drop across the heat exchanger. The analysis indicates that, Nusselt number and friction factor are function of flow rate, tube diameter, cone angle, and curvat...

The successful development of a three degree of freedom motion simulation platform, capable of si... more The successful development of a three degree of freedom motion simulation platform, capable of simulating a car driving on road, is prepared. The motion simulation platform was developed to practically simulate and test an unmanned road vehicle’s capability of driving on a road, before practically being demonstrated on an actual. All aspects of the motion simulation platform’s development are considered, from the conceptual design to its practical implementation. The mechanical design and construction of a motion simulation platform, as well as the electronics and software to enable the operation of this motion simulation platform, are presented. Mathematical models of the process and platform orientation are developed. A controller architecture capable of regulating the process, resulted in the successful control of the motion simulation platform. Practical motion simulation results of Intelligent Motion Technology Pvt. Ltd, demonstrate the motion simulation platform’s success. The...

Wind tunnels are popularly used in testing of applications such as aerodynamics, automobiles, arc... more Wind tunnels are popularly used in testing of applications such as aerodynamics, automobiles, architects, submarine etc. A low speed wind tunnels and its type are present in this .This paper focuses on the wind tunnels and its computational solving approaches. Based on this study, the application of a wind tunnel leading to the quantative predictions have been a combination of theory and experiment. Low speed wind tunnels are about mach no =0.4, 134 m/s this paper gives the idea about various parameters and methods that used for calculation of pressure and temperature and computational methods. This review concludes that, the use of low speed wind tunnel can give the idea for improving the streamline shape of the model and by using scale model cost will be saved.

The manufacturing industry is a sector of our society which constantly faces challenges with the ... more The manufacturing industry is a sector of our society which constantly faces challenges with the variation in demand and supply. Optimization in such a dynamic environment becomes difficult for any industry. Advanced approaches constantly attempt to balance the profit of the supplier as well as contentment level of the customer. Automation in the industry assures that mass production will maintain the supply proportional to the demand. In order to take the automation to the next level, Industry 4.0 allows for a more flexible production environment by introducing the concept of digitalization through a cyber-physical system or CPS. It also becomes an attempt to keep the manufacturing sector updated with the advances in technology of this 21st Cy. This article attempts to list out the concepts of this next generation approach towards a more sustainable model of the manufacturing industry. Moreover, the research will also investigate the advantages and limitations of such a concept in ...

Computational Thermal Sciences: An International Journal

Journal of Physics: Conference Series

The basic objective of the paper is to identify the desired circulation ratio for the natural cir... more The basic objective of the paper is to identify the desired circulation ratio for the natural circulation of water tube boilers in different operating conditions. This requires the basic study of heat flux and the mode of the boiling heat transfer, and the phenomenon like departure from nucleate boiling and tube overheating. The parameters, which need to be studied are heat flux, pressure, dryness fraction, void fraction, liquid velocity and their impact on the required circulation ratio. For a natural circulation boiler, the circulation ratio is one of the most important design parameters as the other design parameter like critical heat flux and skin temperature are mainly derived from the circulation ratio. The required circulation ratio can vary with the boiler pressure, liquid velocity and maximum heat flux. This study is intended to provide input for the safe and optimum design of a natural circulation boiler.

International Journal of Engineering and Advanced Technology

The analytical study has been performed to investigate the combined effects of lid movement and b... more The analytical study has been performed to investigate the combined effects of lid movement and buoyancy force parameter on mixed convective flow in an arc-shape cavity. The dimensional analysis based on Buckingham π-Theorem is used in the present study. It results in correlations for Nusselt number in terms of non dimensionalized parameters, viz. Re, Pr, Gr, θ etc. The correlations developed are validated against the experimental data of horizontal arc- shape cavity and numerical data of inclined arc-shape cavity obtained from open literature. The correlation developed in the present study for horizontal arcshape cavity is valid for wide ranges of Re varying from 30 to 1500 and Gr from 0 to 107. In inclined arc-shape cavity it is valid for Re varying from 30 to 1500, Gr from105 to 107 and inclination angle from 150to 600.The close agreement in the comparison between predicted results by correlation developed in the present study and reported Nu correlation shows the validity of the...