How to predict m-evp in two phase flow?

mariam.sara · January 4, 2013, 10:40

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, 03:22

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

mariam.sara · January 5, 2013, 06:07

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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January 5, 2013, 03:22		#2
msaeedsadeghi Senior Member SSL Join Date: Oct 2012 Posts: 226 Rep Power: 14	You should use a multiphase model (VOF) and write a UDF for evaporation rate.

January 5, 2013, 06:07		#3
mariam.sara Senior Member Join Date: Jan 2011 Posts: 339 Rep Power: 16	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