TITLE : 2D LAMINAR BACKWARD FACING STEP FLOW
BY : CHAM Development Team - M R Malin
VKI, Belgium - N P Waterson
FOR : Validation of Convection Discretisation Schemes
DATE : 1995 PHOENICS Version : 2.2
- 2d steady, incompressible, laminar, backward-facing-step flow at
Reynolds numbers of Re=150 and 450, where Re is based on 2h where
h is the flow inlet height.
- This test problem is widely used for assessing the accuracy of
numerical methods because of the dependence of the reattachment
lengths on Re.
- PHOENICS Library Case N103
- The flow has been studied experimentally by Armaly et al ,
and numerically by many workers, including Gartling ,
Gresho et al  and Freitas .
- Two cases are simulated by PHOENICS, namely Re=150 and Re=450.
- At Re=150, a primary recirculation zone develops immediately
downstream of the step with reattachment at X1/H=4.2, where H is
the step height.
- At Re=450, primary reattachment is at X1/H=9.5 and an additional
separation cell forms on the upper wall of the channel, with
separation at X2/H=7.6 and reattachment at X3/H=11.3.
- For Re>450, 3d effects become significant, and for Re >6,600 the
flow is fully turbulent and 2d.
CALCULATION DETAILS :