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[지완 서]

Frontal area is need to calculate.

But in 2D, Thickness is not exist.

Then we assume scale of thickness...(in fluent, thicknesss = 1m default in reference value)

when we search Cd(in 2D) in google, we find some values.

Are those values obtained assuming a thickness of 1m for both?

Cd is different by thickness..

This question comes from 2D cylinder simualtion

Cd is depend on Re and form.

But, i got different value in D=1m cylinder and D=2m

Simulation is calculated in Re=100

My English is bad.

Thanks read my qustion.

 

[SRP]

Hi,

The drag coefficient is influenced by the size and shape of the object. When you search for Cd values online, these values are often provided for specific conditions, including a certain Reynolds number and sometimes a reference thickness. In 2D simulations, thickness is not a physical parameter, but a reference thickness may be assumed for the purpose of calculations. This reference thickness is often used to non-dimensionalize the results.when comparing Cd values for 2D simulations, make sure to check the reference values and assumptions used in obtaining those coefficients