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Can Brownian force be used in turbulent flow?

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Old   March 12, 2003, 09:22
Default Can Brownian force be used in turbulent flow?
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Chen Fangzhi
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I am trying to simulate the submicron particle transport phenomena in a turbulent flow field. The impact of Brownian effect is critically important. However, in the manual of FLUENT 6.0, it emphasized that Brownain force is intended only for non-turbulent flow (referring to section 19.2.1 and 19.7.4). What is the underlying reason for this limitation? and since the significance of Brownian effect in my model, what can I do to overcome this restriction?
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Old   January 2, 2010, 10:20
Default Can Brownian force be used in turbulent flow
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NH
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Quote:
Originally Posted by Chen Fangzhi
;104875
I am trying to simulate the submicron particle transport phenomena in a turbulent flow field. The impact of Brownian effect is critically important. However, in the manual of FLUENT 6.0, it emphasized that Brownain force is intended only for non-turbulent flow (referring to section 19.2.1 and 19.7.4). What is the underlying reason for this limitation? and since the significance of Brownian effect in my model, what can I do to overcome this restriction?
++
I think by now u know the default BM in fluent does not work. U have to write a udf
docnurulhasan@gmail.com
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Old   January 2, 2010, 17:56
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Originally Posted by NH_Aus View Post
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I think by now u know the default BM in fluent does not work. U have to write a udf
docnurulhasan@gmail.com
Just a question. I'm a long standing CFX user but intend to migrate to FLUENT shortly. Is there some repository of UDFs people write and upload to the web as it seems to be quite a lack of information about them?
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Old   August 3, 2013, 13:21
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Pouyan talebizadeh
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Dear Sir/ madam,

I hope this email finds you well,

I read your post in CFD online about the Brownian motion in Fluent. I have some question about this. Would you please help me that
1- Is the Brownian motion modified in Ansys 14 or not?
2- Is there any way I can find the UDF for Brownian motion which I can use in fluent software?

Thank you in advance for you time

Pouyan
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