Parametric Study of Finned Surfaces Using a Graphical User Interface Developed in Matlab (original) (raw)
Related papers
Modeling of Heat Transfer from Finned Surface
2019
Numerical determination of temperature distribution T (x) and fin heat transfer rate of a rectangular and triangular fin is presented. The shooting method is used which converts the boundary value problem into an initial value problem. Numerical results at different step sizes are compared to the analytical solution. The shooting method starts the solution from a guessed value at the boundary with initial data and produces the final boundary value at the end. The major downside is that the shooting method is computationally time expensive. Calculated the heat transfer for both RECTANGULAR and TRIANGULAR geometry to get the desired output value. Heat transfer rate, efficiency and effectiveness along the length are increased from the tip to the base for all cross section. All the results are plotted in the form of graph.
A BRIEF OVERVIEW OF APPLICATION OF EXTENDED SURFACES (FINS) FOR ENHANCEMENT OF HEAT TRANSFER
Review on application of extended surfaces fins for enhancement of heat transfer , 2019
Extended Surfaces (Fins) are widely used in the engineering field for enhancement of heat transfer rate by increasing surface area with additional material attachment. In many applications like heat exchangers, for economizer, cooling reactor core, electrical transformer and motors, automobile applications, rectifier, etc fins are used for better heat transfer. This paper is about an overview of various types of fins, their classification, their geometries, materials used for it, design considerations and applications with some case studies of thermal simulation and some special applications.
IJERT-Experimental Study of Extended Surfaces (Fins) With Forced Convection
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/experimental-study-of-extended-surfaces-fins-with-forced-convection https://www.ijert.org/research/experimental-study-of-extended-surfaces-fins-with-forced-convection-IJERTV3IS051357.pdf Extended Surfaces (Fins) are widely used in the engineering for getting better heat transfer by providing additional area. In many applications like heat exchangers, for cooling reactor core, electrical transformer, rectifier, etc fins are used for better heat transfer. This work is carried out for find out which material and which cross sectional fin is best suited for the better heat transfer. In this experiment we carried study to find out the heat transfer coefficients for copper, aluminium and steel. We also find out the heat transfer coefficients for same surface area (i.e. A s = 0.0056 m 2) and different cross section like circular, rectangular and trapezoidal of same material copper. And the heat transfer coefficients are also compared on the basis of different air flow rate. After performing this experiment we observed that heat transfer rate is higher in copper rod than aluminium and steel rod. And for different cross section trapezoidal rod has high heat transfer than that of circular and rectangular rod as it has more surface area near the base where the difference in temperature is high. Graphs of surface temperature distribution along the length of rod and heat transfer coefficient V/S heat input explains the relationship of the parameter of different configuration of heat input.
Fins in Thermal Engineering from ANSYS
IJMTST, 2021
The Engine chamber is one of the essential engine components, that is subjected to over the top temperature differences and thermal stresses. Fins are set on the surface of the cylinder to improve the quantity of heat exchange by convection. When fuel is burned in an engine, heat is produced. Additional heat is also generated by friction between the moving parts. In air-cooled I.C engine, extended surfaces called fins are provided at the periphery of engine cylinder to increase heat transfer rate. That is why the analysis of fin is important to increase the heat transfer rate. The main of aim of this work is to study various researches done in past to improve heat transfer rate of cooling fins by changing cylinder fin geometry and material. In the present work, Experiments have been performed to discover the temperature variations inside the fins made in four kind geometries (plate Fins, Circular Pin fins, plate fins with holes, and draft Pin fins) and consistent state heat exchange examination has been studied utilizing a finite element software ANSYS to test and approve results. The temperature variations at various areas of fins models
A fin is a surface that extends from an object to increase the rate of heat transfer to or from the environment by increasing convection. Extensions on the finned surfaces is used to increases the surface area of the fin in contact with the fluid flowing around it. In the study of heat transfer, fins are surfaces that extend from an object to increase the rate of heat transfer to or from the environment by increasing convection. The amount of conduction, convection, or radiation of an object determines the amount of heat it transfers. Increasing the temperature gradient between the object and the environment, increasing the convection heat transfer coefficient, or increasing the surface area of the object increases the heat transfer. Sometimes it is not feasible or economical to change the first two options. Thus, adding a fin to an object, increases the surface area and can sometimes be an economical solution to heat transfer problems. There are two ways to increase the rate of heat transfer: 1) To increase the convection heat transfer coefficient h. 2) To increase the surface area As. It is noted that: Increasing h may require the installation of a pump or fan, or replacing the existing one with a large one. The alternative is to increase the surface area by attaching to the surface extended surfaces called fins made of highly conductive material such as aluminium.
To study thermal analysis of extended surfaces or projections of materials on the system called fins. The fins are used to increase the heat transfer rate from the system to the surrounding by increasing the heat transfer area. The heat transfer effect may be varied by changing material of different thermal conductivities, improvising system geometry, increasing cross section area of fins, using perforations on fin and on CFD analysis of fins. Hence the aim of this paper is to study from different literature surveys that how heat transfer through extended surfaces and the heat transfer coefficient affected by changing cross-section this study is useful to know the better geometry and material for the fins for better system cooling. The main objective of the present paper is computational analysis of heat transfer through fins in exponential profile with growing type and decaying type to quantify and compare it in same boundary conditions after that apply the different types of notches in exponential profile. Objective of this analysis to determine the flow of heat at various notches available and compare the heat flux in different types of cases. The analysis is done by using ANSYS-CFD Fluent.
Investigation of important surface characteristics of a finned tube heat exchanger
1983
Surface characteristics of a finned tube heat exchanger were examined to help predict the contact geometry between metal surfaces. These characteristics were the surface roughness and waviness and the material hardness. A scanning electron microscope was used to observe the surface topography of the fins as well as examining the contact between the aluminum fin and the copper tube. Comparisons of the surface roughness were then made between heat exchangers having different fin numbers (20, 14, and 6) with the result that as the fin number decreased, the roughness also decreased. For a given fin number, it was discovered that the surface roughness increased as the expansion increased. These tests also revealed that, for the 14 fins/inch case, only a portion of the fin collar was actually in contact with the tube.
Development of a new type of finned heat exchanger
Tehnicki vjesnik - Technical Gazette, 2017
Original scientific paper A new geometric form of fins (needle fins) for finned heat exchangers of gas-liquid type is described. It achieves a higher heat transfer coefficient and lower mass of the heat exchange surface relative to the heat exchangers with circular fins which in this case served as a basis for comparison. For the analysis of the heat transfer, the computational fluid dynamics analysis with ANSYS Fluent software was applied. Numerical simulation was performed for the round fins and fins with a new, innovative geometric shape at air flow speeds of 1 m/s to 5 m/s. The results of numerical simulations, with regard to the exchanged heat and pressure drop were verified by the correlations available in the literature and compared to the simulation results for tubes with innovative fins. Results show an increase in the amount of Nu from 20 % to 30 % for 2300 >Re > 12000 while reducing mass of heat exchange surfaces of 23,8 %.
Heat Transfer Analysis and Optimization of Fins by Variation in Geometry
2017
The main aim of the project is to analyze the thermal heat dissipation of fins by varying its geometry. Parametric models of fins have been developed to predict the transient thermal behavior. There after models are created by varying the geometry such as rectangular, circular, triangular and fins with extension. The modeling software used is CREO Parametric 2.0. The analysis is done using ANSYS 14.5. Presently Material used for manufacturing fin body is generally Aluminium Alloy 204 which has thermal conductivity of 110-150W/m-0C. We are analyzing the fins using material Aluminium Alloy 6061 which has higher thermal conductivity of about 160-170W/m-0C. After determining the material the third step is to increase the heat transfer rate of the system by varying geometrical parameters such as cross sectional area, parameter, length, thickness, e.t.c. which ultimately leads us to fins of varying shape and geometries.
A COMPARISON OF HEAT TRANSFER IN FINS WITH DIFFERENT CROSS-SECTIONS.
In machine components where heat is generated, it is necessary to remove residual heat from the chamber in order to prevent the failure caused by thermal stresses. Hence, maximum heat must be dissipated by the component into the atmosphere. Fins are help in achieving such heat transfer between the component and atmosphere. This research paper focuses on the geometrical aspects of fins for which the heat transfer that takes place is maximum. It is assumed that the tips of the fins are insulated.