Analysis Characteristics
- Steady-state
- 2D internal flow
- Axisymmetric
- Turbulent
- Incompressible
Reference
White, F.M., Fluid Mechanics, McGraw-Hill (1986).
Problem Description
A 2D circular pipe is analyzed to verify the fluid flow and turbulence modeling capabilities of Autodesk® CFD.
The k-
turbulence model is used.
The Reynolds number based on the pipe diameter,
, is 14,960.
The pressure drop
is measured across an interval 50 m downstream of the inlet:
Geometry and Boundary Conditions
Results
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 Blasius expression:
Using these parameters:
-
=50.0m
-
=2350
-
=14960
in the expressions above, the following results are computed:
| Benchmark | 2016: Build 20150209 | % Error | 2017: Build 20160302 | % Error | |
|
|
4.0e5 Pa | 399696.34 Pa | 0.454 | 397477.34 Pa | 0.555 |