Laminar heat transfer in porous ducts with variable suction
Abstract
The steady, laminar heat transfer flow of a Newtonian, incompressible, constant property fluid along porous walled conduits is analysed for conditions of variable suction, or injection, through an open ended straight cylindrical tube and a flat duct formed by infinite parallel plates. The development of the velocity and temperature fields in the entrance region of the ducts are analysed for constant temperature and constant heat flux boundary conditions. The flowrate through the duct walls is assumed proportional to the difference of the internal and external pressures by using the law of Darcy for flow through porous media. The velocity, pressure, temperature and Nusselt number distributions are obtained for axial Reynolds number 1050 and 2100; radial Reynolds number in the range of 2 to 10; Prandtl number 0.7 and 7; and dimensionless permeability 4 x 10 to the 7 and 4 x 10 to the 9.
 Publication:

American Society of Mechanical Engineers
 Pub Date:
 December 1978
 Bibcode:
 1978asme.meetS....A
 Keywords:

 Ducted Flow;
 Incompressible Flow;
 Laminar Heat Transfer;
 Newtonian Fluids;
 Porous Walls;
 Suction;
 Heat Flux;
 Nusselt Number;
 Parallel Plates;
 Pipe Flow;
 Prandtl Number;
 Pressure Distribution;
 Reynolds Number;
 Temperature Distribution;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer