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Laminar Flow over a Circular Cylinder

Figure 1 is described in the surrounding text
Figure 1. Mach number contours.

Flow Description

This valiation case describes laminar flow over a circular cylinder. The incoming flow is uniform at the freestream conditions given in Table 1. The resulting Reynolds number based on diameter is 150, which corresponds to a flow which is essentially two dimensional and has periodic vortex shedding.1,2

Table 1. Freestream conditions.
Mach Pressure (psia) Temperature (R) Angle-of-Attack (deg) Angle-of-Sideslip (deg)
0.2 0.00045146 500.0 0.0 0.0

Geometry

The geometry is a circular cylinder with a diameter of 1.0 meter.

Computational Domain and Boundary Conditions

The computational domain extends 200 cylinder diameters out from the cylinder.

Comparison Data

We will compare the average drag coefficient and the dimensionless shedding frequency, or Strouhal number, with the experimental results of Roshko2 and Schlicting3.

Computational Studies

Table 2. Computational studies peformed for the laminar circular cylinder case.
Study Category Person Comments
Study #1 Validation Chris Nelson Compares the full block implicit 1st and 2nd order operators with and without the Global Newton time stepping.

References

1. Nichols, R. H., and Heikkinen, B. D., "Validation of Implicit Algorithms for Unsteady Flows Including Moving and Deforming Grids," AIAA Paper 2005-0683, 2005.

2. Roshko, A., "On the Development of Turbulent Wakes from Vortex Streets," NACA Report 1191, 1954.

3. Schlicting, H., Boundary-Layer Theory, Sixth Edition, p 17, McGraw-Hill Book Company, 1968.


Last Updated: Wednesday, 16-Jul-2008 10:06:56 EDT