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-   -   How to predict m-evp in two phase flow? (http://www.cfd-online.com/Forums/fluent/111353-how-predict-m-evp-two-phase-flow.html)

mariam.sara January 4, 2013 11:40

How to predict m-evp in two phase flow?
 
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Hi i want to predict m-evaporated that transformed from the lower phase in picture attached to the upper phase (steam) the lower phase is saturated water and the two phases flowing in a square duct 1 m x 1 m area? any suggestions pls?


N.B : m-evp=mass inter the domain - mass leave the domain


Thanks

msaeedsadeghi January 5, 2013 04:22

You should use a multiphase model (VOF) and write a UDF for evaporation rate.

mariam.sara January 5, 2013 07:07

Thanks msaeed for the reply. The mass of evaporation is define as below:

mevp=Q/hfg

where Q is the heat rate added
hfg heat of evaporation

how i can write UDF for it ?


mariam


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