Investigation of steady time in a nanofluid passing through a plate

The purpose of writing the dissertation is to investigate the effect of magnetic parameter, the effect of thermophoresis, relative velocity, biotnumber, and amount of parenthesis when reaching steady-state, as well as the effect of speed changes in the input boundary conditions on the amount of skin friction coefficient and Nusselt number. The differential equations governing this problem were solved using the finite difference method with the help of MATLAB software for different values of the governing parameters. The problem is first assumed to be stable and then the effect of velocity changes(decrease-increase) on the boundary layer conditions is investigated. Also, the effect of different parameters governing the problem when reaching the steadystate has been investigated. The results show that the magnetic number and relative velocity parameters, Biot and Prandtl number, and thermophiliccoefficient affect the stability time. With increasing the thermophilic coefficient, the time to achieve stability increases and decreases relativevelocity, the biot number increases. The magnetic parameter and the Prandtl number decreased when the stability was reached. Also, with increasing thespeed of the Nusselt number, the coefficient of skin friction decreased and with decreasing the speed of the Nusselt number, the coefficient of skin frictionincreased.

کلیدواژه ها:

Nano fluid ، Brownie motion ، Thermophoresis ، The heat transfer ، Stretch sheet ، point of stillness