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How to predict m-evp in two phase flow?

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Old   January 4, 2013, 11:40
Default 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


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Old   January 5, 2013, 04:22
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You should use a multiphase model (VOF) and write a UDF for evaporation rate.
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Old   January 5, 2013, 07:07
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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 ?


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