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Rotation of a heated impervious disk in a second grade fluid bounded by a porous medium

Srivastava A. C., Saxena P.

International Journal of Applied Mechanics and Engineering

2009

Vol. 14, no 2

523-538

The flow and the heat transfer due to the rotation of a disk at a small distance from a porous medium of finite thickness have been discussed when the entire space between the disk and the bottom of the porous medium is filled with a second grade fluid. The disk and the bottom of the porous medium are maintained at constant temperatures; the temperature of the disk being higher. It is observed that with the increase of the Darcy number, all the components of velocity and temperature decrease in the entire region but the rate of heat transfer from the interface increases. With the increase of the non-Newtonian parameter (i) rotational velocity increases but radial and axial velocity components decrease in the entire region, (ii) the temperature increases in the entire region, (iii) the rate of heat transfer from the interface increases. Results of this paper have applications in engineering, biomedical and ground water problems.

Magneto-hydro-dynamic unsteady second-grade fluid flow for Stokes' problem

Mohyuddin M. R., Ali Mirza A., Siddiqui A. M.

International Journal of Applied Mechanics and Engineering

2007

Vol. 12, no 4

1061-1072

The present note discusses the flow of an unsteady second-grade fluid oscillating on a plate. The magnetic field is applied perpendicular to the flow field in two cases (i) when it is fixed to the fluid, and (ii) when it is fixed to the boundary. The applied magnetic field is found to slow down the flow for the case when it is fixed to the fluid whereas this effect is reversed in the case when it is fixed to the plate. The physical interpretation of the physical parameters is presented graphically and is compared with the already known results.

Wpływ efektów bezwładnościowych oraz parametrów reologicznych na rozkład ciśnienia w przepływie uogólnionego płynu drugiego rzędu typu potęgowego w zakrzywionej szczelinie

Ratajczak P., Walicka A., Walicki E., Ratajczak M.

Inżynieria i Aparatura Chemiczna

2006

Nr 6s

205-207

Rheodynamics of the generalized second grade fluids in curvilinear channels with a constant gap thickness are discussed in the paper. A power-law type model of the generalized second grade fluid was assumed. Based on the analytical solutions of movement equations, dependences describing the pressure distribution were given. The influence of a modified Reynolds number and viscoelastic parameters on pressure profiles was examined. . •