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How to understand items for development of MRF equations? |
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January 6, 2013, 10:05 |
How to understand items for development of MRF equations?
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#1 |
Member
Jianye Xia
Join Date: Mar 2009
Posts: 32
Rep Power: 18 |
Dear Foamers,
Recently I am trying to understand how the momentum equations in Rotating Frame is developed, and I found the wiki page at: http://www.openfoamwiki.net/index.ph...RF_development which show the development for the eqns in MRF. But I didnot understand some items in these eqns (cause pics can not be paste on this page, the questions in attached as doc format), can anyone help me to explain it? It will be appreciated! These items include "nabla dot [omega crossmultiply r]" equal to zero? |
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January 9, 2013, 23:07 |
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#2 |
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Jianye Xia
Join Date: Mar 2009
Posts: 32
Rep Power: 18 |
Anybody know this?
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February 15, 2018, 14:53 |
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#3 | |
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Viraj Belekar
Join Date: Jun 2016
Posts: 68
Rep Power: 9 |
Same doubt!
In the MRF equations development, do you know why 1) del dot (omega cross r) = 0? 2) gradient of (omega cross r) = 0? 3) u_R dot gradient of (omega cross r) = omega cross u_R? I tried all the vector-tensor identities and relations but I am unable to get the answer. Thanks a lot! Viraj Quote:
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