Drag Coefficient
 

Hi, there!

I'm a new usser of the CFX 10.0. I'm working at EADS Aerodynamics Department. And I'd like to know how can I get the CD with CFX 10.0. Or I'd like to know how can I do it with Ensight 8.0,

thanks!

Re: Drag Coefficient
 

Hi...I think you ahve to know the drag force, dynamic pressure and reference area to calculate the drag coefficient. You can calculate dynamic pressure as = 0.5*density*velocity*velocity and Reference area depends on the geometric model. CFX witll give you drag force value. Go to POST, Load the result file, click the calculator, choose "force", select the direction of drag (x,y or z), choose the surface of the geometry on which drag has to be calculated and thats it. click "calculate". It will give the drag value... Regards, VVJ.

Re: Drag Coefficient
 

Hello Julian, I am would like to be your friend. I am working on the drag reduction problem. I am working as project trainee in Indian Institute of Science- Bangalore (Inda). I am an Indian. If you are interested, then please mail me. My mail-id is vijeshjoshi23@yahoo.co.in Regards, VVJ

Re: Drag Coefficient
 

Thanks a lot, your advise was very usefull.

Take care!

Re: Drag Coefficient
 

i am working also on drag reduction meaby i can be your friend too? i try to reduce the drag of a rotating wheel

Re: Drag Coefficient
 

Hi Klaas, feeling very happy to be your friend. You said your problem is to reduce the drag on a rotating wheel. Can you please elaborate on rotating wheel. Is there any friction or something? With the drag value on this wheel, what further studies will be done? Please let me know. Regards, VVJ.

Re: Drag Coefficient
 

well i try to determine the lowest drag in form and there is no other friction then air so it must be in the form and the ideal in differant angle´s

as well a disc wheel as a spoked wheel

we are talking about a bike wheel

Re: Drag Coefficient
 

Hi Klaas, I have not worked on form drag problems. I dont have much knowledge in this problem. Anyhow , I will work on this after some time. Presently I have exams. I will mail you again. Regards, VVJ

Re: Drag Coefficient
 

thanks