VMFL027
VMFL027
Turbulent Flow Over a Backward-Facing Step
Overview
| Reference | D.M. Driver, H.L. Seegmiller, "Features of a Reattaching Turbulent Shear Layer in Divergent Channel Flow". AIAA Journal,Vol 23, pp. 163-171, 1985 | ||
| Solver | Ansys Fluent, Ansys CFX | ||
| Physics/Models | 2-D turbulent flow with separation and reattachment, realizable k-ε model | ||
| Input File |
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| Project Files | Link to Project Files Download Page |
Test Case
Turbulent flow over a backward facing step is modeled. The flow separates at the step and reattaches on the wall downstream, enclosing a region of recirculation. The inlet is at 4 H upstream and the outlet at 30 H downstream from the location of the step, where H is the step height. Reynolds number based on the step-height is about 37,400.
Table 26: Materials, Geometry, and Boundary Conditions
| Material Properties | Geometry | Boundary Conditions |
|---|---|---|
|
Density : 1 kg/m3 Viscosity: 0.0001 kg/m-s |
Step height = 1 m Total length of the channel = 34 m Height of the channel = 9 m |
Inlet velocity specified as fully developed turbulent velocity profile |
Analysis Assumptions and Modeling Notes
The flow is steady. Realizable k-ε model was used to model turbulence.
