sonppw Posted April 1, 2014 Share Posted April 1, 2014 now i understand like this gas External force is like gravity and someting affect to the field, Geometry noting happen gravity if i turn off apply external force in FLIP solver so i make my test hip file by using Gas external force but gravity effect is noting happen what a problem? External force.hipnc Quote Link to comment Share on other sites More sharing options...
anim Posted April 5, 2014 Share Posted April 5, 2014 tirst of all the gravity in your file is called Gravity_gravity1 (check the Details view) because Unique Data Name on gravity force is checked then it will work, but to see it more clearly you can temporarily bypass your gasfieldvop1 as that is destroying almost all the input velocity thus making gravity effect almost invisible Quote Link to comment Share on other sites More sharing options...
sonppw Posted April 6, 2014 Author Share Posted April 6, 2014 (edited) tirst of all the gravity in your file is called Gravity_gravity1 (check the Details view) because Unique Data Name on gravity force is checked then it will work, but to see it more clearly you can temporarily bypass your gasfieldvop1 as that is destroying almost all the input velocity thus making gravity effect almost invisible Thanks!! i have one more question case of surface field in gas external force accroding help file forces applied on the inside of surface i force value in gravity dop set to positive and then i can see the v.y attribute value getting increasing value in geometry (i set to geometry in gas externel force) so like this reason all i expect is disappear surface field and surfval attribute can get increasing value if positive force value applide to surface field(SDF) but my expect is wrong.. maybe i don't think undestand about it External force2.hipnc Edited April 6, 2014 by sonppw Quote Link to comment Share on other sites More sharing options...
anim Posted April 7, 2014 Share Posted April 7, 2014 the surface field acts as a mask so geometry inside of the surface field receives the external force the geometry outside doesn't but the surface field itself is not modified by that node so you will not see increasing your surfval attribute (on top of that you are recreating surface field at each timestep which would keep it from accumulating the value even if external forces node would modify it) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.