velocity field function in star ccm

rahulpawar · September 13, 2016, 03:11

Hi all

I am using overset mesh for my simulation. body(ship) is moving with constant speed say 8m/s. I have defined DFBI 6DOF body and in place of initial velocity, I need to put velocity vector. I need to ramp velocity from 0m/s to 8m/s in lets say 15 seconds and this velocity is in only X direction. How can i write field function to ramp velocity of moving body and then how can i call that function in 6dof body.

thank you

ggulgulia · September 14, 2016, 01:19

Hi,

If you know at the velocity values at specified time steps, you can input them in a table. For this under the velocity inlet boundary, instead of constant, you have to change the input to table.

rahulpawar · September 21, 2016, 02:55

thank you

I would also like to define field function for static pressure as I am simulating with single phase(water) and system defined functions are not working

September 13, 2016, 03:11	velocity field function in star ccm	#1
rahulpawar New Member Maharashtra Join Date: Jul 2016 Posts: 9 Rep Power: 9	Hi all I am using overset mesh for my simulation. body(ship) is moving with constant speed say 8m/s. I have defined DFBI 6DOF body and in place of initial velocity, I need to put velocity vector. I need to ramp velocity from 0m/s to 8m/s in lets say 15 seconds and this velocity is in only X direction. How can i write field function to ramp velocity of moving body and then how can i call that function in 6dof body. thank you

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September 14, 2016, 01:19		#2
ggulgulia Senior Member Gajendra Gulgulia Join Date: Apr 2013 Location: Munich Posts: 144 Rep Power: 13	Hi, If you know at the velocity values at specified time steps, you can input them in a table. For this under the velocity inlet boundary, instead of constant, you have to change the input to table.

September 21, 2016, 02:55		#3
rahulpawar New Member Maharashtra Join Date: Jul 2016 Posts: 9 Rep Power: 9	thank you I would also like to define field function for static pressure as I am simulating with single phase(water) and system defined functions are not working