[Leen_1]

Hello everyone !
first , thank you for your attention, i get into trouble when i use VOF model to simulate a bubble's movement in water, UDF , i get on line, nearly exhaust me, the udf sentence,like this,
{
Alloc_Storage_Vars(pDomain,SV_VOF_RG,SV_VOF_G,SV_N ULL);
Scalar_Reconstruction(pDomain, SV_VOF,-1,SV_VOF_RG,NULL);
Scalar_Derivatives(pDomain,SV_VOF,
-1,SV_VOF_G,SV_VOF_RG,Vof_Deriv_Accumulate);
}

what is it mean? Could anyone provide any help on this? Thanks.

[rezacfd1361]

what s the meaning of selecting sum in "define surface monitor" for "Phrases" , "volume fraction" . I have a 2 phase domain, primary phase is air and secondary phase is water. I am going to track surface changes for water, in internet i read that I have to select sum when i intoduce monitors/surface/surface monitors/define surface monitor.
my case is a Neumerical Wave Tank.
please help me.