pressure in rigid body

esmail · August 21, 2015, 04:18

hi every body
we want to capture impact pressure in point of rigid body.
our simulation is: wedge fall in water(rigid body,cfx 14.5 ,sliding mesh).we should use pressure ,total pressure or.... to show impact pressure?

ghorrocks · August 21, 2015, 19:12

Have you read the definitions of pressure and total pressure? That answer is obvious if you know what they mean. I realise I am being horrible by not telling you the answer but if you are going to do CFD you need to be able to find answers to questions like this yourself.

esmail · August 22, 2015, 10:02

which please?

ghorrocks · August 23, 2015, 04:44

Pressure. So my question to you is why is total pressure not appropriate in this case?

esmail · August 23, 2015, 04:55

i used pressure, but it just show hydrostatic pressure and cant show impact pressure.

ghorrocks · August 23, 2015, 05:46

You could use the absolute pressure and subtract the atmospheric pressure to give the pressure on the pressure acting on the hull.

August 21, 2015, 04:18	pressure in rigid body	#1
esmail New Member esmail Join Date: May 2015 Posts: 20 Rep Power: 10	hi every body we want to capture impact pressure in point of rigid body. our simulation is: wedge fall in water(rigid body,cfx 14.5 ,sliding mesh).we should use pressure ,total pressure or.... to show impact pressure?

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August 21, 2015, 19:12		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Have you read the definitions of pressure and total pressure? That answer is obvious if you know what they mean. I realise I am being horrible by not telling you the answer but if you are going to do CFD you need to be able to find answers to questions like this yourself.

August 22, 2015, 10:02		#3
esmail New Member esmail Join Date: May 2015 Posts: 20 Rep Power: 10	which please?

August 23, 2015, 04:44		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Pressure. So my question to you is why is total pressure not appropriate in this case?

August 23, 2015, 04:55		#5
esmail New Member esmail Join Date: May 2015 Posts: 20 Rep Power: 10	i used pressure, but it just show hydrostatic pressure and cant show impact pressure.

August 23, 2015, 05:46		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	You could use the absolute pressure and subtract the atmospheric pressure to give the pressure on the pressure acting on the hull.