hi, one more thing, what is 'default interior' my mesh looks like this, water should be the fluid but it shows as Default interior because i did not set the continuum is it ok. For the previous question what should be the boundary condition for no flow (xxxxxxxxxxx)? which is the water surface of the fluid in the channel

inlet outlet xxxxxxxxxxxxxxxxxxxxxxx 1 1 1 1 1 1 1 water (interior) 1 1__ __1

1_______________1

wall

Dear sir I have a problem with this title. If it's possible for you please send me your received responses. Very thanks for your attention to my request. With the best regards. Mahdi saniee nezhad