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Forum: FLUENT September 27, 2014, 08:16
Replies: 33
Views: 10,790
Posted By flotus1
Wow nobody spotted the error I made Of...

Wow nobody spotted the error I made

Of course its T = \frac{1}{f} = \frac{D}{Sr \cdot u}
Forum: FLUENT September 26, 2014, 09:53
Replies: 33
Views: 10,790
Posted By flotus1
Did you read, understand and follow the advice...

Did you read, understand and follow the advice given here carefully?
If so, give more information about what you did so far and the simulation parameters you used.
Forum: FLUENT March 18, 2014, 11:04
Replies: 33
Views: 10,790
Posted By flotus1
What you observed in your simulation is more...

What you observed in your simulation is more related to physics than to a numerical concept.
For the unsteady flow around a bluff body, the Strouhal number describes the frequency of the vortex...
Forum: FLUENT February 28, 2014, 09:18
Replies: 33
Views: 10,790
Posted By flotus1
I just wanted to make sure you changed the...

I just wanted to make sure you changed the reference values to match your simulation setup.
Remember: c_d = \frac{F_d}{\frac{1}{2} \rho u^2 A}
Since Fluent cant guess which values you had in...
Forum: FLUENT February 28, 2014, 03:26
Replies: 33
Views: 10,790
Posted By flotus1
No one can help you with this If you keep...

No one can help you with this If you keep ignoring the advice you are given.
I dont know how you lowered the Reynolds number, but no matter how you did it your results still depend more on the...
Forum: FLUENT February 24, 2014, 06:49
Replies: 33
Views: 10,790
Posted By flotus1
http://www.cfd-online.com/Wiki/Ansys_FAQ#Why_are_m...

http://www.cfd-online.com/Wiki/Ansys_FAQ#Why_are_my_results_inaccurate.3F

Dont expect to get good agreement with the standard k-epsilon model.
Getting drag coefficient values that are in...
Forum: FLUENT February 20, 2014, 08:55
Replies: 33
Views: 10,790
Posted By flotus1
What estimation brought you to this conclusion? ...

What estimation brought you to this conclusion?

Edit: another thing I forgot to mention: use at least a second order upwind scheme for the convective fluxes and a second order implicit scheme for...
Forum: FLUENT February 17, 2014, 12:52
Replies: 33
Views: 10,790
Posted By flotus1
Again, 1000 time steps with a time step size of...

Again, 1000 time steps with a time step size of 0.075s is only 75 seconds, which is way too short to develop a vortex strees with a period time of 75s.

Use the time step size I recommended...
Forum: FLUENT February 10, 2014, 17:38
Replies: 33
Views: 10,790
Posted By flotus1
For low the flow around a circular cylinder at...

For low the flow around a circular cylinder at low Reynolds numbers, the standard values for turbulent kinetic energy and dissipation at velocity inlets in fluent are way too high.
This produces...
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