|April 23, 2011, 23:17||
wave tank absorbing problem
Join Date: Mar 2011
Posts: 6Rep Power: 6
hi. i'm trying to absorb waves in the end of a 2-D wave tank using momentum source method. this is what i've done, and i met some problems.
1. suppose that the velocity field after absorbing is
where C is a spatial transition coefficient varies from 1 to 0. the subscript j represents the value before absorbing, and m represents the value after absorbing. substracting the momentum equations with source term
with the momentum equations without source term
i got the horizontal momentum source
where C' is the horizontal deviation of C.
by the same way i got the vertical source
after applying them into FLUENT, i got the problem of water level shown in this image
i defined the region from 80 to 100 is the absorbing area. this picture was taken at t=1s. it seems like the absorbing part didn't absort any wave but also generated a wave! and after a long time, the water level at x = 100 went down to y=3.5m. i really don't know where i am wrong. would u help me please? this problem really disappointed me.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Tank Filling Problem||Suryan||FLUENT||0||October 19, 2010 21:28|
|active wave absorb(about wave tank)||zhaochuangang||ANSYS||0||September 22, 2010 02:29|
|wave resistance problem with SHIPFLOW||gtfeng||Main CFD Forum||2||April 20, 2010 10:40|
|Mass conservation problem in mixing tank multiphase simulation||rockewan||FLUENT||0||April 6, 2010 12:34|
|asking about UDF wave tank||teguhtf||FLUENT||1||March 9, 2010 09:04|