Table of contentsNo headers
- 2D internal flow
White, F.M., Fluid Mechanics, McGraw-Hill (1986).
A 2D circular pipe is analyzed to verify the fluid flow modeling capabilities of Autodesk Simulation CFD. The Reynolds number based on the pipe diameter, , is 477. The pressure drop is measured across an interval approximately 60m downstream of the inlet:
Geometry and Boundary Conditions
Analytical and numerical calculations of pressure drop are compared. The analytical expression for pressure drop from White (1986) is:
- is the Darcy friction factor
- is the mass flow
- is the pipe length across which is measured
The Darcy friction factor is computed from the linear expression:
This pressure drop equation applies to fully developed flows so the pressure drop extracted from the numerical results starts from a point that is 60.0 meters down-stream of the inlet.
Using these parameters:
- =40 .0m.
in the expressions above, the following results are computed:
| ||Benchmark|| 2012: Build 20110628 ||% Error||2013: Build 20120131 ||% Error|
| ||1528 Pa ||1537.95 Pa ||0.616 ||1499.44 Pa ||1.958 |