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Inlet pressure profile for my project

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Old   April 28, 2011, 06:09
Default Inlet pressure profile for my project
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Govindaraju
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Dear all
Please find the attached pressure profile which I would like to give as an inlet boundary condition.

I need your help how to generate this kind of pulse wave form.

Is there any equation or function to generate this kind pulse wave form?

but I saw one reply from ghorrocks that ,"a user function with a 1D interpolation will do it easily"

I could not understand what is the userfunction. ghorrocks can you explain please?

Kindly help me
Thanks in advance

Regards
kmgraju
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Old   April 28, 2011, 06:58
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Lance
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Have a look at this example:

http://www.edr.no/blogg/ansys_blogge...nsient_profile
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Old   April 28, 2011, 10:58
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Govindaraju
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Dear Mr. Lance

Yes what you are saying is correct. But how can we obtain the values for the inlet?. Is there any method available to get the values?
Please help me

Thank you

Regards
kmgraju
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Old   April 28, 2011, 11:06
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Lance
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Um.... are you asking how to get the values from your graph to Excel? Look in the graph?

Here, I'll even give you one to start with:
Time [s] Pressure [mmHg]
0 85


...or use some software like Windig (or similar) to extract the curve from the image.
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Old   March 21, 2012, 09:31
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krish
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Quote:
Originally Posted by Lance View Post
Sir,

I am beginner in CFD. Saw this example and started working on transient condition. The excel portion of more than 100 values looks laborious. Is there any other method involving table such that when the inlet is selected the values of x and z automatically appears?
please help me
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Old   March 21, 2012, 17:43
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Glenn Horrocks
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You can copy/paste the numbers into the CCL code, or use a csv file for a 3D interpolation function.
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Old   March 28, 2012, 18:45
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Hesam Moghaddam
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Dear Krish,
you can use Dagra software for extracting the data points out of you curve and
export them into excel. It's so user friendly. Then follow the link about exporting excel data file into CFX for using as BC and you won't have any proble, I just did it now.
Regards,
Hesam
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