Department of Mathematics: Recent submissions

Now showing items 341-360 of 577

Comment on "Steady mixed convection stagnationpoint flow of upper convected Maxwell fluids with magnetic field" [International Journal of non-linear mechanics, 44(2009):1048-1055]

Sharma, Bhupendra Kumar (Academic Journal, 2013)

In the present comment, we point out a major flow found in the paper "Steady mixed convection stagnation-point flow of upper convected Maxwell fluids with magnetic field" [International Journal of non-linear mechanics, ...
This paper discusses the use of an approximated charge carrier density to model an organic thin-film transistor (OTFT) using a double exponential density of states. Traditionally, published work employs a single exponential density of states and Gaussian density of states. On the contrary, this paper employs a double exponential density of states in the Fermi integral to evaluate the charge carrier density for the OTFT. We consider two exponential density of states, one rateled to the tail region and one to a deep region, in addition to various associated parameters. The distribution of localized trap states between the highest and lowest orbital is expressed as a density of states, one for the tail states and one for the deep states. Tail states are better described by the Gaussian function, while deep states are better described by the exponential density of states. Therefore, if we require that the two regions be defined by a single function, then the function should be a sum of the two, the exponential and the Gaussian, to more accurately describe the complete region. The double exponential density of states is employed to evaluate and approximate the Fermi integral using various mathematical methods, so that the error is lower for various parameters.

Sharma, Bhupendra Kumar (Academic Journal, 2014-09)

In this paper, we demonstrate that the previously reported effect of the transverse magnetic field on a steady mixed convective heat and mass transfer flow of an incompressible viscous fluid past an infinite vertical ...
Double exponential density of states and modified charge carrier transport in organic semiconductors

Sharma, Bhupendra Kumar (Springer, 2022-06)

This paper discusses the use of an approximated charge carrier density to model an organic thin-film transistor (OTFT) using a double exponential density of states. Traditionally, published work employs a single exponential ...
Modelling Pulsatile Blood Flow Using Casson Fluid Model Through an Overlapping Stenotic Artery with Au-Cu Hybrid Nanoparticles: Varying Viscosity Approach

Sharma, Bhupendra Kumar (Springer, 2023-04)

The present study aims to perform computer simulations of two-dimensional hemodynamics of blood flow through an overlapping stenosed artery considering the non-Newtonian Casson fluid model to simulate the arterial region’s ...
Mathematical Analysis of Hall Effect and Hematocrit Dependent Viscosity on Au/GO-Blood Hybrid Nanofluid Flow Through a Stenosed Catheterized Artery with Thrombosis

Sharma, Bhupendra Kumar (Springer, 2023-04)

The present paper addresses the rheological perspective of blood flow with the suspension of Au/GO nanoparticles through the curved artery with multiple stenosis and thrombosis. The influences of hematocrit-dependent ...
Impact of Arrhenius activation energy on MHD nanofluid flow past a stretching sheet with exponential heat source: A modified Buongiorno’s model approach

Sharma, Bhupendra Kumar (World Scientific, 2023)

Nanofluids have a wide range of applications in biological research. They are employed in targeted medication administration, hyperthermia (for cancer treatment) and differential diagnostics like magnetic resonance image ...
Numerical investigation of the entropy generation analysis for radiative MHD power-law fluid flow of blood through a curved artery with Hall effect

Sharma, Bhupendra Kumar (Taylor & Francis, 2023-06)

In the last few decades, mortality rate due to blood vessel diseases has hiked rapidly and it is almost one-third of total mortalities. Identifying the vascular geometry and hemodynamic blood flow inside the artery is ...
Optimizing energy generation in power-law nanofluid flow through curved arteries with gold nanoparticles

Sharma, Bhupendra Kumar (Taylor & Francis, 2023-07)

The investigation of blood flow into curved arteries is fascinating and essential to prevent the advancement of vascular disease. Motivated by electro-kinetic manipulation, gold nanoparticles, and their size applications, ...
Sensitivity analysis of electroosmotic magnetohydrodynamics fluid flow through the curved stenosis artery with thrombosis by response surface optimization

Sharma, Bhupendra Kumar (Elsevier, 2023-07)

The current numerical investigation focuses on the sensitivity analysis of the pertinent parameters of the electrically conducting fluid (blood) with the suspension of Al2O3 nanoparticles through the constricted arteries ...
Darcy-Forchheimer hybrid nanofluid flow over the rotating Riga disk in the presence of chemical reaction: Artificial neural network approach

Sharma, Bhupendra Kumar (Elsevier, 2023-08)

The aim of present study is to examine the augmentation of thermal energy transfer in hybrid nanofluid flow caused by a rotating Riga disk in the presence of thermal radiation and chemical reaction. The silver and aluminium ...
Bayesian regularization networks for micropolar ternary hybrid nanofluid flow of blood with homogeneous and heterogeneous reactions: Entropy generation optimization

Sharma, Bhupendra Kumar (Elsevier, 2023-08)

This study aims to analyze a Bayesian regularization backpropagation algorithm for micropolar ternary hybrid nanofluid flow over curved surfaces with homogeneous and heterogeneous reactions, Joule heating and viscous ...
Three-Dimensional Unsteady Mixed Convection and Mass Transfer Flow with Periodic Temperature

Sharma, Bhupendra Kumar (Dirasat, 2008)

This research investigates the effect of periodic heat flux and mass flux on unsteady convection flow bounded by an infinite vertical flat porous plate. The porous infinite surface is subjected to a slightly sinusoidal ...
The effect of suction on magnetohydrodynamic forced flow of a viscous electrically conducting fluid through a porous medium induced by a rotating disk

Sharma, Bhupendra Kumar (Interdisciplinary Centre for Mathematical and Computational Modelling, 2012)

The present paper investigates the steady MHD forced flow of an incompressible viscous electrically conducting fluid, due to an infinite rotating disk bounded by a porous medium. A uniform suction is applied on the upper ...
Fluctuating hydromagnetic natural convection flow past a magnetized vertical surface in the presence of thermal radiation

Sharma, Bhupendra Kumar (Thermal Science, 2012)

The effect of radiation on fluctuating hydro-magnetic natural convection flow of viscous, incompressible, electrically conducting fluid past a magnetized vertical plate is studied; when the magnetic field and ...
Comment on "Induced magnetic field with radiating fluid over a porous vertical plate: Analytical study" by Sahin Ahmed [Journal of Naval Architecture and Marine Engineering

Sharma, Bhupendra Kumar (Bangladesh Academy of Scienceshttps://www.banglajol.info/index.php/JNAME/article/view/10579, 2010)

In the present comment, we point out some errors found in the above referenced paper.
Effect of chemical reaction on Jeffrey fluid model of blood flow through tapered artery with thermo-diffusion and diffuso-thermal gradients

Sharma, Bhupendra Kumar (ASTFE, 2018)

In this article, we have studied a non-Newtonian fluid model for blood flow through a tapered artery with a stenosis by assuming blood as Jeffrey fluid. The fluid is assumed to be non Newtonian, namely Jeffrey fluid and ...
Nanofluid flow and heat transfer from heated square cylinder in the presence of upstream rectangular cylinder under Couette-Poiseuille flow

Sharma, Bhupendra Kumar (Techno Press, 2019-07)

A heated square cylinder (with height A*) is kept parallel to the cold wall at a fixed gap height 0.5A* from the wall. Another adiabatic rectangular cylinder (of same height A* and width 0.5A*) is placed upstream in an ...
Mathematical Analysis of Hybrid Nanoparticles (Au−Al2O3) on MHD Blood Flow Through a Curved Artery with Stenosis and Aneurysm Using Hematocrit-Dependent Viscosity

Sharma, Bhupendra Kumar; Goyal, Poonam (Springer, 2022-10)

The current study deals with hybrid nanoparticles (Au−Al2O3/blood) to explore the impact of hemodynamic parameters (such as wall shear stress and resistive impedance) on unsteady MHD blood flow via a curved artery in the ...
Optimization of heat transfer nanofluid blood flow through a stenosed artery in the presence of Hall effect and hematocrit dependent viscosity

Sharma, Bhupendra Kumar (Elsevier, 2023-07)

The heat transfer rate of the MHD nanofluid blood flow through a stenosed composite artery with hematocrit-dependent viscosity and Hall effect is optimized by using the response surface methodology (RSM). An experimental ...
Heat transfer by free convection flow with radiation along a porous hot vertical plate in the presence of transverse magnetic field

Sharma, Bhupendra Kumar (RSMAMS, 2007)

An analysis of radiation effect on steady laminar free convection flow of an electrically conducting fluid along a porous hot vertical plate has been discussed. Approximate solutions have been derived for the velocity, ...

Now showing items 341-360 of 577

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