May 26, 2023 at 9:39 amgaurav_shrivas15Subscriber
I want to calculate coefficeint of drag (Cd) using fluent; for the flow over cylinder in 2-dimensional domain:
Dia of cylinder= 0.1 m
what Reference values should I used in fluent to find the Cd as defaults values are 1 for area,depth and length.
When I calculated Cd using Report>Forces> cylinder wall>coefficient of drag. the results are not matched with available experimental results
May 26, 2023 at 12:08 pmFederico Alzamora PrevitaliSubscriber
Assuming that your mesh is fine and solution has converged sufficiently, your Cd will depend on those reference values that you have defined. I would imagine that the experimental results that you mention would have their corresponding values documented.
May 26, 2023 at 12:28 pmgaurav_shrivas15Subscriber
my cd value is coming 0.78 where in research paper it is around 1.2 for Re=2x10^4.
this value coming when i am giving reference value as follows
Area=0.1 (as diameter)
can you give any suggestion so I can reduce my error?
May 26, 2023 at 1:08 pmFederico Alzamora PrevitaliSubscriber
I assume you have set the same values as your upstream conditions (velocity and density). How many iterations have you run? Has your solution converged? Can you show a screenshot of your residuals and pressure field?
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