Laminar flow over a cylinder at Re=40 getting both viscous and pressure foces?

tareqkh · April 5, 2015, 04:09

Hey Guys,

I hope that you are all fine. I have been working on an example about flow over a cylinder. My domain is at Rmax=10 and a cylinder radius at Rcyl=0.5 and properties of rho=1m3/kg, dynamic viscosity of 0.025 N.s/m2. I have done the grid convergence study successfully and obtained the drag coefficient at zero mesh spacing. After finishing the grid convergence, I have to prove that the pressure force is the dominant part in the drag coefficient. Even though simpleFoam provides the folder post-processing with file force in it, I am unable to filter that and prove what I mentioned previously. Is there any way to filter the data and prove that the drag coefficient comes mostly from pressure forces instead of the viscous force. I would be more than happy if someone of you could give exploitations. I am attaching the forcecoeffs.dat that I have obtained.

http://www.mediafire.com/download/24...orcecoeffs.zip

Thank you,

tareqkh · April 6, 2015, 02:41

Any suggestions are welcomed

Thank you,

April 5, 2015, 04:09	Laminar flow over a cylinder at Re=40 getting both viscous and pressure foces?	#1
tareqkh Senior Member CFD Join Date: Nov 2010 Location: United States Posts: 243 Rep Power: 16	Hey Guys, I hope that you are all fine. I have been working on an example about flow over a cylinder. My domain is at Rmax=10 and a cylinder radius at Rcyl=0.5 and properties of rho=1m3/kg, dynamic viscosity of 0.025 N.s/m2. I have done the grid convergence study successfully and obtained the drag coefficient at zero mesh spacing. After finishing the grid convergence, I have to prove that the pressure force is the dominant part in the drag coefficient. Even though simpleFoam provides the folder post-processing with file force in it, I am unable to filter that and prove what I mentioned previously. Is there any way to filter the data and prove that the drag coefficient comes mostly from pressure forces instead of the viscous force. I would be more than happy if someone of you could give exploitations. I am attaching the forcecoeffs.dat that I have obtained. http://www.mediafire.com/download/24...orcecoeffs.zip Thank you,

April 6, 2015, 02:41	Any Answers????	#2
tareqkh Senior Member CFD Join Date: Nov 2010 Location: United States Posts: 243 Rep Power: 16	Any suggestions are welcomed Thank you,

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