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-   -   Can coefficient of drag value be as large as 14? (https://www.cfd-online.com/Forums/fluent/210919-can-coefficient-drag-value-large-14-a.html)

vasu November 7, 2018 07:40

Can coefficient of drag value be as large as 14?
 
Hi people,
I am new to Ansys Fluent, currently I am simulating the re-entry of a space module with following free stream conditions.

1. Inlet Mach number = 6
2. static pressure = 554.113 Pa
3. static temperature = 237.218 K

The data corresponds to atmospheric condition at an altitude of 35 km. The simulation I am doing is steady state. When residuals converge to value below 1e-03, I got coefficient of drag around 14. The reference conditions used for calculating the drag coefficient are:


1. Area = 1 m^2
2. Velocity = 1853.159 m/s

3. Density = 0.008137 kg/m^3

Can somebody tell me, is this value of drag coefficient is acceptable?

LuckyTran November 7, 2018 09:45

Is it right to use 1 m^2 for the reference area?

vasu November 7, 2018 11:10

Thank you sir! The area should be frontal area of the module.


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