forces on the wall of cistern tank

cfd-user01 · August 16, 2009, 23:04

Hi guys,
I am trying to analyze forces on the wall of close cistern fuel tank.
cistern is filled by 85% with liquid, and when it accelerates liquid has back force to the wall of cistern. How I can simulate this using star-cd?
what boudaries I have to use for closed cistern?
thanks for your reply.

vishyaroon · August 17, 2009, 12:26

You may want to use VOF methods to simulate this in STAR CD or STAR CCM+.

cfd-user01 · August 18, 2009, 00:03

I don't need to calculate VOF, I just need a pressure distribution in the cistern tank. As you know when moving closed cistern stops suddenly liquid inside the cistern tries to move forward and pressure increases infront, and when cistern moves with acceleration liquid tries to move back side of cistern. What i have to do is to analyze the pressure distribution, so I can know forces on the wall of cistern.

Pauli · August 18, 2009, 11:23

No VOF means no sloshing. At that point why not use F = m * a + rho * g * h?

August 16, 2009, 23:04	forces on the wall of cistern tank	#1
cfd-user01 New Member Elyorbek Join Date: Aug 2009 Posts: 2 Rep Power: 0	Hi guys, I am trying to analyze forces on the wall of close cistern fuel tank. cistern is filled by 85% with liquid, and when it accelerates liquid has back force to the wall of cistern. How I can simulate this using star-cd? what boudaries I have to use for closed cistern? thanks for your reply.

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August 17, 2009, 12:26		#2
vishyaroon Senior Member Aroon Join Date: Apr 2009 Location: Racine WI Posts: 148 Rep Power: 17	You may want to use VOF methods to simulate this in STAR CD or STAR CCM+.

August 18, 2009, 00:03		#3
cfd-user01 New Member Elyorbek Join Date: Aug 2009 Posts: 2 Rep Power: 0	I don't need to calculate VOF, I just need a pressure distribution in the cistern tank. As you know when moving closed cistern stops suddenly liquid inside the cistern tries to move forward and pressure increases infront, and when cistern moves with acceleration liquid tries to move back side of cistern. What i have to do is to analyze the pressure distribution, so I can know forces on the wall of cistern.

August 18, 2009, 11:23		#4
Pauli Senior Member Pauli Join Date: Mar 2009 Posts: 189 Rep Power: 17	No VOF means no sloshing. At that point why not use F = m * a + rho * g * h?