Simulation of phase transformation inside a moving object, the movement of which depe

Vakhtang · December 5, 2018, 08:08

It is necessary to determine the period of time over which the water temperature (the initial state is ice) change from minus 30 degrees Celsius to plus 36 degrees Celsius. Water (the original state is ice) is in an airtight polymeric shell (it has the form of a pillow). Together with the shell, the ice makes reciprocating movements in the process chamber. The chamber is completely filled with constantly heated water, the temperature of which is 36 degrees. As a result of the movements, the water is mixed under the shell, and outside. It is important to model close to natural mixing.

So far, I have not found examples of modeling phase transformation inside a moving object, the movement of which directly affects the speed of phase transformation (I looked at examples of solving problems in Ansys, Comsol, and FLOW-3D).

Question. What software tools will allow to simulate and carry out the calculation?

If someone is interested in a joint solution of this problem, then I suggest jointly publishing in co-authors the results of the decision in scientific journals

ghorrocks · December 5, 2018, 16:20

This is a very complex simulation. Have you done the simpler ones first, such as ice melting in a stationary object? Even this is a complex simulation. But if you cannot model a stationary object there is little point attempting a moving object.

CFX does not have built-in models for melting of a solid. I think ANSYS support has some examples of how it can be done so I would talk to them for the examples.

Vakhtang · December 6, 2018, 09:26

Quote:

Have you done the simpler ones first, such as ice melting in a stationary object?

I found attempts to simulate phase transformations in a static object in ANSYS (https://www.youtube.com/watch?v=D3Mk...&index=32&t=0s) and FLOW-3D (https://www.youtube.com/watch?v=b2Bf7XxLpTU). I have not modeled my task in statics. I want to know if it is possible to model my task (in dynamics)? If so, in which software product?

ghorrocks · December 6, 2018, 16:30

It is possible to model almost any fluid thing in CFX. But difficult simulations require skill and knowledge. So yes, it is possible. But whether CFX is a good choice is another question.

Gert-Jan · December 6, 2018, 16:46

You are not the first one who wants to model this kind of physics. Ask technical support. They know the possibilities. And the impossibilities.

Vakhtang · December 9, 2018, 11:05

ghorrocks

Quote:

I think ANSYS support has some examples of how it can be done so I would talk to them for the examples

Gert-Jan

Quote:

Ask technical support

At the moment I do not have a customer number, and therefore I can not access to the online customer portal. May I ask you to send my question to the support service if you have access to the online customer portal?

ghorrocks · December 9, 2018, 16:35

No, I cannot contact support for you. The reason you purchase support is so you can ask questions like this. If you have not purchased support then you will have to work it out yourself.

Gert-Jan · December 9, 2018, 17:50

Quote:

Originally Posted by Vakhtang

At the moment I do not have a customer number, and therefore I can not access to the online customer portal. May I ask you to send my question to the support service if you have access to the online customer portal?

I consider this as an indecent proposal. I pay an awful lot of money for support, and you ask me to give it away, giving you a benefit. We can help you pro bono in this forum, but we are not silly.

If you ask me this in the CFD Freelancers forum, then we may come to a deal.

December 5, 2018, 08:08	Simulation of phase transformation inside a moving object, the movement of which depe	#1
Vakhtang New Member Vakhtang Join Date: Dec 2018 Posts: 3 Rep Power: 7	It is necessary to determine the period of time over which the water temperature (the initial state is ice) change from minus 30 degrees Celsius to plus 36 degrees Celsius. Water (the original state is ice) is in an airtight polymeric shell (it has the form of a pillow). Together with the shell, the ice makes reciprocating movements in the process chamber. The chamber is completely filled with constantly heated water, the temperature of which is 36 degrees. As a result of the movements, the water is mixed under the shell, and outside. It is important to model close to natural mixing. So far, I have not found examples of modeling phase transformation inside a moving object, the movement of which directly affects the speed of phase transformation (I looked at examples of solving problems in Ansys, Comsol, and FLOW-3D). Question. What software tools will allow to simulate and carry out the calculation? If someone is interested in a joint solution of this problem, then I suggest jointly publishing in co-authors the results of the decision in scientific journals

December 5, 2018, 16:20		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,705 Rep Power: 143	This is a very complex simulation. Have you done the simpler ones first, such as ice melting in a stationary object? Even this is a complex simulation. But if you cannot model a stationary object there is little point attempting a moving object. CFX does not have built-in models for melting of a solid. I think ANSYS support has some examples of how it can be done so I would talk to them for the examples. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

December 6, 2018, 16:30		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,705 Rep Power: 143	It is possible to model almost any fluid thing in CFX. But difficult simulations require skill and knowledge. So yes, it is possible. But whether CFX is a good choice is another question. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

December 9, 2018, 16:35		#7
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,705 Rep Power: 143	No, I cannot contact support for you. The reason you purchase support is so you can ask questions like this. If you have not purchased support then you will have to work it out yourself. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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December 6, 2018, 16:46		#5
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,828 Rep Power: 27	You are not the first one who wants to model this kind of physics. Ask technical support. They know the possibilities. And the impossibilities.