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add mass for floating busddy
Posted May 4, 2010, 6:20 a.m. EDT 2 Replies
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haloo
I am modeling floating budy. the experiments i did I add masss for my floating budy. how could i do that in comsol
Salim
I am modeling floating budy. the experiments i did I add masss for my floating budy. how could i do that in comsol
Salim
2 Replies Last Post May 5, 2010, 7:11 a.m. EDT
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Posted:
2 decades ago
Hi
Well it depends I beleive on the type of modelling you are doing, if its structural + fluidic, you could change the density of the structural part, assuming you have a "body force" or "volumic force" of -G*rho.
If its only fliudic and a cavity, then the body force (as pressure) is still gravity*density which gives you a pressure in the direction of the gravity vector, that you must then decompose with respect to the cavity surface normal to get the correct vector direction and amplitudes as pressure.
Hope this helps
Have fun Comsoling
Ivar
Well it depends I beleive on the type of modelling you are doing, if its structural + fluidic, you could change the density of the structural part, assuming you have a "body force" or "volumic force" of -G*rho.
If its only fliudic and a cavity, then the body force (as pressure) is still gravity*density which gives you a pressure in the direction of the gravity vector, that you must then decompose with respect to the cavity surface normal to get the correct vector direction and amplitudes as pressure.
Hope this helps
Have fun Comsoling
Ivar
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Posted:
2 decades ago
hi
thanks for your hents , there is another thing my fluid look odd its like jumping every where as in picture i attched. it should not be like that . i am using FSI in MEMS mode.
and another thing any advice to avoid the waves refliction which is comming back after hitting the wall? i did it as out let with velocity=0 but its not working
thanks for u r time
salim
thanks for your hents , there is another thing my fluid look odd its like jumping every where as in picture i attched. it should not be like that . i am using FSI in MEMS mode.
and another thing any advice to avoid the waves refliction which is comming back after hitting the wall? i did it as out let with velocity=0 but its not working
thanks for u r time
salim
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