LAMINAR FLOW IN FINITE POROUS CHANNEL WITH VARIABLE INJECTION OR SUCTION
An investigation was conducted to obtain the incompressible laminar flow characteristics in a channel with porous walls of finite length in which fluid is being injected or sucked through the channel walls. An approximate solution was obtained based on the variational principle which is expressed in terms of the given, but arbitrary, function characterizing the variation of the injection velocity at the porous walls for any given velocity profile at the entrance to the porous region. It depends on the Reynolds number R/sub 2/ and the nondimensional maximum injection velocity v-bar /sup o/, both of which are based on a reduced maximum velocity at the entrance. A similarity rule for the problem was then established, and numerical examples are given for the case where the entrance velocity profiles are inlet or parabolic and the injection velocity is a constant or varies linearly. The results of the flow characteristics for these examples for different values of v-bar are presented in the form of curves. (auth)
- Research Organization:
- Brooklyn. Polytechnic Inst.
- NSA Number:
- NSA-15-006096
- OSTI ID:
- 4080857
- Report Number(s):
- PIBAL-614; AFOSR-TN-60-1197
- Country of Publication:
- United States
- Language:
- English
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