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Old   August 17, 2012, 04:20
Question A question in Dsmc modeling
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MHP
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Hello there,
Is there anyone who works in DSMC field?
I am working with DS3V free software which is written by G.A.BIRD, but have some problems for modeling a body. Is there anyone who can help me please?

Last edited by MHP; August 17, 2012 at 04:30. Reason: Title change
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Old   September 25, 2012, 15:40
Question Dsmc
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Quote:
Originally Posted by MHP View Post
Hello there,
Is there anyone who works in DSMC field?
I am working with DS3V free software which is written by G.A.BIRD, but have some problems for modeling a body. Is there anyone who can help me please?
Does any one know softwares that work with dsmc simulations like dsmcfoam ?
Best Regards.

Last edited by MHP; September 27, 2012 at 03:35.
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Old   February 6, 2014, 05:02
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Hello MHP,

did you solve your problem with the DS3V software? What version do you have and does it work correctly? When I'm doing the example with D3SV and close the window for checking the geometry the whole programm is closed...I don't know how to avoid this phenomenon.

Can anybody help?

Best regards
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Old   February 14, 2014, 17:05
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Dear CFDnewbie147,
Yes, I solved my problem last year.
I used the latest version in the Bird's web page.
In my opinion DS3V is not a well stable software, in some cases it may be OK but sometimes it may be disappointing.
If possible specify your problem more clearly, maybe I can help you.
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Old   February 17, 2014, 02:56
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Dear MHP,

thank's for answering.
Oh you're right, it's not very stable.

I would try to use it for a complex 3D reentry-simulation. So i have the geometry as an CAD-file and I want to dictate the temperature of the flow and the mach number. I want to get the aero-coefficient and look how much the surface is heaten up.

Can you help me?

Best regards
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Old   February 27, 2014, 16:08
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In my opinion fortunately reentry simulation by DS3V would result in good conclusion than any other cases. I think there was an example in reentry object simulation in the Bird's web page.
If you want to start with DS3V I recommend to read its manual precisely. You should first discrete any faces of your object with some softwares like Rhinoceros then import the mesh data in DS3V. While generating the initial conditions for each face you will find blanks to fill data like mach number and temperature of the flow.
In the output files there are enough results presents to calculate aero-coefficient.
You would find the answer of major part of your problems in the manual of DS3V presented in the Bird's site.
Good luck.
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Old   February 28, 2014, 05:40
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Dear MHP,

Thank you for the information. I already have the DS3V software but unfortunately the example doesn't work.

Do you have experience with this Rhinoceros software to make meshes? Which datafiles do I have to use for this tool?
I hope you can help again.

Best regards
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Old   March 9, 2014, 13:01
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Dear CFDNewbie147

I will be glad to help you but It is almost one year that I didn't work with Rhino and DS3V and I hardly remember details to work with them. It would be better for you to contact with Prof. Bird if possible.
Usually the DS3V program stops without notification if there is an error in the flow definition files. If I remember correctly, there is a mistake in the delta wing flow case that is available for download on the website. I would recommend you to run the DS3V program for a different case (see surface and flow definition files enclosed in the attachment), this should work.
Fortunately Rhino has a good help. All I find in the Rhino is from its good help. I'm sure that you would find your answers in it's help in the category of mesh.You should save your mesh file as ".raw" format. It is said in the manual of DS3V. Again as a note I strongly recommend to read and use DS3V manual part by part and step by step.

Good luck.



Attached Files
File Type: zip DS3V example.zip (52.0 KB, 16 views)
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Old   April 4, 2014, 07:07
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Dear MHP,

sorry for answering so late...I tried your example and it works...but now I have to check what are the parameteres in pre- and post-processing...

I already contacted Mr. Bird but he could'nt help me because he has a lot to do:/

Thank u again, I'm coming back to post if there's something new
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Old   April 21, 2014, 12:10
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Dear CFDNewbie147

In post processing many important parameters in DSMC are available overally in graphic user interface that is presented in the DS3V software and in detail in the two .txt files presented in the corresponding folder of your project.

Good luck.
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Old   December 30, 2014, 02:13
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Hi there, I'm working in DSMC. Till now i was working in 2D simulation and i'm planning to develop a 3D algorithm. Is any 3D open source program available for ref??
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