article · Heat Transfer
This research examines how chemical reactions affect the heat transfer of a viscous Newtonian fluid moving over a stretching surface in a permeable medium. The mathematical model incorporates the effects of non-uniform heat sources or sinks, variable fluid viscosity, thermal radiation, and ohmic heating, also known as Joule heating. Using dimensionless variables, the governing nonlinear equations for continuity, momentum, thermal, and solutal fields are transformed and solved numerically via the fourth-order Runge-Kutta Fehlberg method. The results demonstrate that fluid temperature drops with an increased Prandtl number, but rises with higher Joule heating and Brinkman parameters. Increasing the variable viscosity parameter slows the velocity distribution. Meanwhile, chemical concentration profiles increase alongside the Soret number but decrease as the Schmidt number rises.
Understanding how heat and mass move through fluids passing over moving surfaces is essential for improving thermal efficiency. By mathematically capturing the roles of variable viscosity, electrical resistance heating, and chemical reactions, this research provides precise calculations that help scientists predict temperature and chemical concentration shifts in complex fluid environments.
The abstract presents theoretical, early-stage mathematical modelling and does not indicate a specific application pathway, end user, or commercial development timeline.
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Abstract This study investigates the chemical reaction influence on heat transfer flow of viscous Newtonian fluid over a moving surface under the intensity of nonuniform heat source/sink. Variable fluid viscosity and ohmic heating effects are considered in the model equation. The uniqueness of the present investigation is to scrutinize the significance of nonuniform heat source/sink and ohmic heating on the heat transfer flow of optically thin radiative fluid in a permeable medium. The flow equations of continuity, momentum, thermal and solutal fields are converted by invoking relevant dimensionless variables. Also, the converted nonlinear equations are analyzed numerically by using the fourth order Runge–Kutta Fehlberg approach. The significance of model parameters are scrutinized and discussed in detail via graphs and tables. The important findings of this study are the effects of Joule heating , viscous dissipation parameter , variable fluid property parameter and radiation parameter on fluid flow, energy profile and solutal field. The results show that the thermal field depreciates as the Prandtl number increases but escalates against higher values of Joule heating parameter and Brinkman number. Also, the outcome of this study reveals that an enhancement in the values of variable viscosity parameter declines velocity distribution. Concentration distributions behave as a growing function of the Soret number and diminishing function of the Schmidt number. Furthermore, contrasting this study with existing results reveals excellent agreement.
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DOI: 10.1002/htj.22915
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