ENTROPY GENERATION DUE TO PERISTALTIC FLOW OF CU-WATER NANOFLUID IN A TUBE THROUGH A POROUS SPACE UNDER EFFECT OF MAGNETIC FIELD AND HALL CURRENTS: APPLICATION OF BIOMEDICAL ENGINEERING

摘要

This paper deals with an analysis of entropy generation due to the peristaltic induced flow of viscous incompressibleelectrically conducting nanofluid in a tube containing a porous medium under the influence of a uniform transverse magnetic field and Hall currents. The pure water is used as the base fluid. Copper (Cu) nanoparticles are considered with the base fluid. The tube is filled with a homogeneous porous medium. Darcy's law is used to model the governing equations. The flow is investigated in the wave frame of reference moving with constant velocity with the wave. Long wavelength and low Reynolds number approximations are utilized in problem formulation. Exact analytical solutions are obtained for the axial velocity, temperature, pressure gradient, stream function, entropy generation, and Bejan number. The graphical analysis is carried out to examine the impacts of sundry parameters on flow quantities of interest. Comparative study is also made for Cu−water with pure water. The results presented reveal that the axial velocity and temperature of Cu−water nanofluid are increasing functions of the Hall parameter. Copper nanoparticles prove an effective coolant since they sufficiently reduce the fluid temperature in the tube. The trapping fluid can be increased and the central line axial velocity can be raised to a considerable extent by increasing the Darcy number. The nanoparticle volume fraction also influences the size of the trapped bolus. This model finds its applications in biomedical engineering and artificial bioprocessors owing to their vast and novel applications in modern drug delivery systems.