Flow through a furrowed channel. Part 1: Calculated flow patterns
Abstract
A high efficiency membrane oxygenator is reported which utilizes pulsatile flow through furrowed channels to achieve high mass transfer rates. Numerical solutions of the time dependent twodimensional NavierStokes equations were studied in order to show the structure of the flow through. Results show steady flow through a furrowed channel will separate provided the Reynolds number is sufficiently large. The effect of varying the Reynolds number and the geometric parameters is given. Comparison with solutions calculated using modern boundary layer theory show excellent agreement. Unsteady flow solutions are given as the physical and geometric parameters are varied. The structure of the flow patterns leads to an explanation of the high efficiency of the membrane device. Quasisteady theory is shown to be incorrect if a separated region is present. In particular if the flow is decelerating a separated region will enlarge in distinct contradiction to the ideas of quasisteady theory.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 1978
 Bibcode:
 1978STIN...7927472S
 Keywords:

 Channel Flow;
 Flow Distribution;
 NavierStokes Equation;
 Separated Flow;
 Boundary Layer Flow;
 Flow Geometry;
 QuasiSteady States;
 Reynolds Number;
 Unsteady Flow;
 Fluid Mechanics and Heat Transfer