Saadat U L L A H K H A N Suri (original) (raw)

Papers by Saadat U L L A H K H A N Suri

NUST Journal of engineering sciences, Dec 1, 2018

The computational fluid dynamics codes play a paramount role by demonstrating the system dynamics... more The computational fluid dynamics codes play a paramount role by demonstrating the system dynamics. The solid dynamics in a multiphase reactor can be analysed from (Chaos, Fractures, Clustering Discrete Element and Eulerian-Langrangian) simulation methods. The Chaos analysis is studied from pressure variation and time series. It includes the characterization of the flow region and their transition. The correlation dimension from the gas phase will describe the scale behaviour in the Chaos analysis. An effective flow model with definite investigation is obtained from this analysis. The flow regimes will be characterized by the structures variation. The volume of fluid and continuum surface force models elaborate on the fluidized bed bubble dynamics in the reactor. The bubbles formation and gasification process of (Fuel gas) are studied from parameters by including (Minimum fluidization velocity, Gas surface tension, Gas viscosity and Density). The results demonstrate the parameters which are influenced by (Particle density and Size). The investigation in time series signals for the biomass gasification process will be demonstrated from the fluidized bed hydrodynamics and system basics. The solid dynamics has been investigated by indicating a novel bubbling in biomass (Wood) in the gasification process time signals. The indication of complex signals in solid dynamics can be obtained from it simultaneously.

NUST Journal of Engineering Sciences, 2018

Journal of Applied and Emerging Sciences, 2019

Carburizing technologies are used to provide strength on low quality metals. This technology is b... more Carburizing technologies are used to provide strength on low quality metals. This technology is being developing with novel improvements significantly. The carburizing process consists of, first releasing Carbon mono-oxide from charcoal material and then transfers carbon to raw metal. There are favorable upgradation in these technologies from researchers which have a paramount industrial importance. In Vacuum gas carburizing, the steel metal is carburized with (Acetylene and Propane) gases. These gases are at low pressure and high temperature. The results show that the metal is 1.5 times harder than its raw form. There are also used mathematical models to validate the results. It used gas and solid phases for validation. In pulse carburizing, carbon diffusion on steel is investigated with heat treatment. This process includes several carburizing stages. This process is based on Darken bi velocity and drift velocity. It accounts to demonstrate the kinetics of carbon transfer on steel...

Journal of Petroleum Science and Engineering, 2018

Multiphase pumps are now in high demand as a result of undersea wells. The resulting sharp increa... more Multiphase pumps are now in high demand as a result of undersea wells. The resulting sharp increase in the demand for multiphase pumps has made it necessary to optimize the operating performance of these pumps. The primary shortcoming of multiphase flow transport technology is that the characteristics of the internal flow change according to the gas volume fraction (GVF). This research aimed to establish a numerical analysis method that is used commercial CFD packages to evaluate the multiphase flow with high reliability and proposes a numerical method to investigate the effect of different GVFs on the flow characteristics. An appropriate combination of bubble size, closure interphase force model, and coefficient of force acting on the interface between the water and air phases is important for predicting the performance of the multiphase flow. The reliability of the new numerical analysis method was proven by comparing the numerical and experimental results. A model pump was produced and the structural stability of the prototype was secured through an analysis according to the API610 11th standard (Modal, Pressure Load). The model pump was made by AL7075 and the experiment device is connected with a 150A SUS pipe flange. The error range of the reliability verification of the multi-phase flow was about 0.5 to 1.5% at the flow rate used in the design. The numerical results obtained for pressure performance generally corresponded to high reliability within the operating range. Advanced computational fluid dynamics based on the three-dimensional steady and unsteady Reynolds-averaged Navier-Stokes equations were solved to analyze the detailed dynamic flow phenomenon with various GVFs. The effects of various interphase forces acting between the liquid and gas phase such as drag, lift, virtual mass, wall lubrication and turbulent dispersion forces, and the diameter of bubbles in the gas phase on the hydraulic performance were investigated.

The current review research's main objective is to develop dispersion models in the multilayer cu... more The current review research's main objective is to develop dispersion models in the multilayer curtain coating with the production of metallized paper. To achieve this, the curtain coating on the paper substrate is employed with respect to multilayer coating of polymers. The first layer of polymer is applied to the paper and then it is subjected to vacuum metallization with aluminum deposition. After it, another second layer of polymer is subjected on it to prevent it from oxidation. These coated polymers are different in nature. The metallized paper will be produced which has high strength will be formulated in this application of curtain coating. The instability of curtain and air entrainment will be minimized from high Weber number, low Reynolds number, Optimum web speed and Coat weights. The above demonstrated process simulation will be modelled in Ansys-CFD. The dispersion of solids in the curtain flow through substrate moving on the web will be evaluated from different numerical methods. Each method has its own characteristics to study the nature of solids dispersion. The high loaded solids dispersion will be investigated from numerical methods including Langrangian

NFC-IEFR journal of engineering & scientific research, Dec 1, 2019

Flotation of low ranked/oxidized coal becomes difficult with oily collectors. The prime factor pa... more Flotation of low ranked/oxidized coal becomes difficult with oily collectors. The prime factor parts accounted by lessening in coal hydrophobicity are the occurrence of polar hydrocarbons groups (hydroxyl, carbonyl, phenol and peroxides) on the coal surface. The up-gradation in coal flotation has been achieved due to the enhancement in hydrophobicity by pretreatments. The dry coal is conditioned with the pretreatment steps of grinding, mixing/conditioning, ultra sound, thermal treatment, microwave and direct mixing of the chemical reagents prior to wetting. These are the pretreatments methods among them grinding, mixing/conditioning are contemplated to separate the oxidized film coating on the coal particles surfaces. The separations of impurities are also indicated from ultra-sonic treatment. The Separation of pore/hydration water and hydroxyl functional groups through coal surface is accounted by microwave and thermal pretreatments. The procedure regarding direct contact produce the oxidize coal evaded for collector deposit on coal surface. The interception generally rises from hydration carapace on coal surface; in this duration, coal surface is wetted by water. The present research study is highlighted to see the distinct pretreatment steps effects on the rate of coal flotation. It is a welcome result declaration with highly precise evaluation.

Pakistan journal of analytical & environmental chemistry, Dec 24, 2020

The computational fluid dynamics techniques keep a paramount role by evaluating a reactor perform... more The computational fluid dynamics techniques keep a paramount role by evaluating a reactor performance. The transitory performance of a Trickle bed reactor is readily monitored from its three phase's flow conditions. This research review study corresponds towards the formation of boundaries in this Trickle bed reactors system to designate its comprehensive methodology with an optimized solution. The main paramount significance of computational fluid dynamics techniques is to observe the validity and an effective significance of the experimental result. The catalyst bed is modelled with the help of dynamic and steady state models by introducing mass and energy conservation equations. The Eulerian-Eulerian multiphase modelling technique is designed for hydro-desulfurization (HDS) and hydro-dearomatization (HDA) chemical process change from interactive momentum models. The effect in bed porosity on the HDS reaction process is observed from interactive mass transfer with solid bed condition in Trickle bed reactor. The congregated results from computational fluid dynamics codes show that wetting efficiency increases with increase in both hydrogen sulphide concentration and HDS conversion. The conversion of HDS reaction decreases with increase in hydrogen disulphide (H 2 S) concentration at both partially wetted and wetted bed conditions. On the other hand, there is small decrease in HDS conversion from 72% to 63.75% at H 2 S volumetric concentration of 0 to 8%. These observations also indicate that computational fluid dynamics provides random accessibility of liquid flow in Trickle bed reactor. There results also reveal that there is periodic variation in saturated liquid phase. The regions which are close to its wall are less irrigated. These characteristics can be changed and have effect on the reactor performance. Hence, the present review study presents the unprecedented results with high accuracy.

Journal of Applied and Emerging Sciences, Jul 9, 2019

The hydrogen possesses high calorific value and it is necessary to utilize this energy due to cur... more The hydrogen possesses high calorific value and it is necessary to utilize this energy due to current energy based resources depletion. It elaborates the paramount importance of hydrogen as a future renewable fuel. There are used different techniques for hydrogen storage and its transportation. In transportation techniques, there are high pressure compression and liquefaction from pipelines. On the other hand, there is developed an optimized model which fulfills the challenges by regarding hydrogen transportation with its low cost. The prominent practiced hydrogen storage techniques are; Adsorption, Casting on alloys, Absorption and Metal hydride reactor. These techniques can store hydrogen from 1.28 wt. % to 19.6 wt.%. Hence, the need to transport hydrogen through storage has become possible by attaining the challenges. It is an unprecedented and welcomed result declaration with highly precise evaluation

Energies, Mar 18, 2023

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Pakistan journal of scientific and industrial research, Apr 8, 2019

Indigenous (Chamlang) coal possesses excessive concentrations of impurities, such as ash and orga... more Indigenous (Chamlang) coal possesses excessive concentrations of impurities, such as ash and organic and inorganic sulphur. In the present research froth flotation technique was applied for reducing inorganic sulphur and ash content in coal. Frothing agent, pH, separation time and air velocity were the main parameters employed to reduce ash content in the indigenous coal. The optimum values of flotation parameters by including pH, air velocity and separation time were found to be 7, 90 scf/h and 55 min. Keeping parameters at their optimum values, better quality of coal was obtained by reducing ash and sulphur content to 57 and 50.757% respectivety.

Fast pyrolysis is a procees to convert low energy biomass into energy products such as oil. In th... more Fast pyrolysis is a procees to convert low energy biomass into energy products such as oil. In this present research study, Computational fluid dynamics tool employ a pramount role for optimizing heating effect in fast pyrolysis of biomass. Simulation of material for all phases is made possible by nergy model. The particle heating and its interaction mechanism with reactive gas phase is aimualetd with muti-fluid model from the granular flow in a fluidized bed reactor. The distribution of heat in fluidized bed pyrolysis reactor is simulated with its effect on the system. The simulation model inter-relates the effect of thermal degradation of biomass with respect to energy dynamics (enthalpy and internal energy) of fast pyrolysis system. The operating condition for convective heat transfer are computed by this modelling. The study investigates the activation energy of the system with its heating effect on fast pyrolysis dynamics. It is also investigated that paramount heating features of fast pyrolysis of biomass in a fluidized bed reactor. This method is proposed for intrinsic effect of heating flow conditions for fluidized bed reactor simulation.

Energies

Recently, the depletion of fossil fuel reserves and the harmful environmental effects caused by b... more Recently, the depletion of fossil fuel reserves and the harmful environmental effects caused by burning fossil fuels have signified the supreme importance of utilizing sustainable energy reserves such as geothermal and solar energies. The advancement of the Organic Rankine Cycle as a clean energy generation path by researchers has gained momentous demand for its commercialization. The sole Organic Rankine Cycle can produce a large amount of energy in contrast to other power production cycles. To make this clean energy recovery sustainable, liquefied natural gas cold energy can be utilized through regasification to integrate the Organic Rankine Cycle with the anti-sublimation carbon dioxide capture process, merging the biogas setup. Liquefied natural gas cold energy recovery has paramount importance with aspects of energy economy and environment preservation. Liquefied natural gas regasification in shell and tube heat exchangers poses a minimal freezing risk and is high duty. Anti-su...

Journal of Applied and Emerging Sciences

Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences, 2019

Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, 2021

The current review research's main objective is to develop dispersion models in the multilaye... more The current review research's main objective is to develop dispersion models in the multilayer curtain coating with the production of metallized paper. To achieve this, the curtain coating on the paper substrate is employed with respect to multilayer coating of polymers. The first layer of polymer is applied to the paper and then it is subjected to vacuum metallization with aluminum deposition. After it, another second layer of polymer is subjected on it to prevent it from oxidation. These coated polymers are different in nature. The metallized paper will be produced which has high strength will be formulated in this application of curtain coating. The instability of curtain and air entrainment will be minimized from high Weber number, low Reynolds number, Optimum web speed and Coat weights. The above demonstrated process simulation will be modelled in Ansys-CFD. The dispersion of solids in the curtain flow through substrate moving on the web will be evaluated from different num...

Quaid-e-Awam University Research Journal of Engineering, Science & Technology, 2020

The environmental problems caused by industrial pollutants and global warming are on the rise. Th... more The environmental problems caused by industrial pollutants and global warming are on the rise. There is a need to develop a technology for reducing harmful pollutants. The co-combustion is getting serious attention by the scientists regarding its key facets to reduce the environmental pollutants. Its function is based on utilization of biomass with coal. In this work different types of biomass were used with coal samples to identify the suitable methodology. The biomass resource fulfills the requirement with reducing environmental pollutants and overcome energy crises. The ratios of biomass with coal samples were analyzed using stack gas analyzer. The banana tree waste (BTW) was found to be effective for reducing CO2 and CO emission. While, Cow dung manure (CDM) was found to be efficacious to decrease NOx. LC 80%+BTW 20% for SO2 and CDM for NO. To conclude, CDM and BTW decreases the emissions keeping blending ratio 80:20 with lignite coal to biomass in co-combustion respectively.

NFC IEFR Journal of Engineering and Scientific Research, 2019

Pakistan Journal of Analytical & Environmental Chemistry

Lignin has been found as a naturally available aromatic resource for biofuel production. Reduced ... more Lignin has been found as a naturally available aromatic resource for biofuel production. Reduced reliance on fossil fuels and replacement with a green and environmentally friendly strategy are currently one of the most pressing challenges. There has been significant growth in energy consumption, necessitating the transition to an alternative energy source. The current renewable energy source has significant biofuel production potential. It is critical to discuss the process parameters for pinpointing lignin content as part of the technology development process. Biofuel production possesses various challenges that need to be addressed. In this research, we precisely discussed the numerous lignin conversion mechanisms that can boost the biofuel output. Catalytic deoxygenation is a fuel promotion process that decreases the oxygen content, which causes instability and corrosion. SiO2, ZrO2, CeO2, TiO2, and Al2O3 are used in catalytic deoxygenation to produce biofuel. The use of chosen A...