The flow through a gauze screen
Abstract
The incompressible flow through a resistive screen located in a straight duct is analysed onedimensionally. The solutions are of two types. One predicts regular flow for all screen resistances and ratios of screentoduct area, A'/S. The other predicts anomalous flow, i.e. reversal of the flow far downstream of the screen, under some conditions of A'/S when the screen resistance coefficient, K, exceeds 4.0 When A'/S = 0, a common solution, indicating zero velocity far downstream of the screen appears. If the flow is regular, the screen drag coefficient, CD' exceeds unity and increases as A'/S increases. If the flow is anomalous, CD 1 and vanishes when the screen resistance coefficient is infinite. Solution of the anomalousflow type cannot represent real flows. Nevertheless, when A'/S and k are compatible with the existence of a solution of this type, it appears that a flow represented by the alternative, regularflow solution does not occur in practice.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 January 1978
 Bibcode:
 1978STIN...7924301T
 Keywords:

 Drag;
 Ducted Flow;
 Flow Equations;
 Incompressible Flow;
 Boundary Value Problems;
 Flow Distribution;
 Flow Velocity;
 Graphs (Charts);
 Resistance;
 Fluid Mechanics and Heat Transfer