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Calculation of Drag Coefficient manually

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Old   December 10, 2008, 16:32
Default Calculation of Drag Coefficient manually
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PRASHANT GHADGE
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In a given 2-D geometry, which area does fluent considers for the calculation of Drag Coefficient? I am solving for the drag of an ellipse. Fluent gives the value of Drag Coefficient directly. But how do we know the area considered by fluent?
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Old   December 10, 2008, 21:35
Default Re: Calculation of Drag Coefficient manually
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CDE
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The area is simply the cross sectional area of a sphere, pi*r^2
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Old   December 11, 2008, 00:48
Default Re: Calculation of Drag Coefficient manually
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selvag
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Projected area is used in finding lift and drag coeffiecient. For example, you can give the diameter of cylinder when you are interested in flow over cylinder.
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Old   December 17, 2008, 16:20
Default Re: Calculation of Drag Coefficient manually
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PRASHANT GHADGE
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I was trying to mach the coeffient of drag value calculated by fluent with my mannual calculation, but the values were different. But Later I found that fluent takes some default vale of Area and other parameters. It does not consider the Area in our geometry.
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Old   December 13, 2012, 16:31
Default area problem
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Chaudhary
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sajid is on a distinguished road
i want to calculate area of circles which would be used in ansys fluent ....
it is 2d heat exchanger and i have problem how to calculate area of circle in front of flow or which area i have to put in reference value ..
i have confusion whether i have to use area of 2 or 4 circles ???
kindly tell me how to calculate this area or which area i have to put in reference value ??? i have attached the jpeg. file of structure to further explain it ?
waiting for answer...i will be very thankful to you.
what Reference values should I used in fluent to find the area as defaults values are 1 for area,depth and length.
Area=?
Depth=?
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