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Old   July 3, 2003, 13:44
Default Particle tracing and Re
  #1
Jackie
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Hello all,

I have two questions waiting for suggestions please.

1. I like to put a particle at the inlet boundary and see it's tracing line, but I don't know how can I create a particle and put it in that location.

2. I simulated the flow in a stirred tank. After running the program, relevant Reynold's numbers were reported. Could anybody explain how CFX compute the Reynold's number.

Thank you in advance for all kind answers.

Jackie.

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Old   July 3, 2003, 16:21
Default Re: Particle tracing and Re
  #2
zdong
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I think you can track a particle in Post by plotting a streamline...
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Old   July 4, 2003, 06:24
Default Re: Particle tracing and Re
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Jackie
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Hello zdong,

Did you mean I just simulate stirred tank as one phase flow and put a particle in the tank later?

Can I simulate them as a multiphase flow?, and how can i input a parameter of a particle? such as density, size, number of particle, volume fraction ,or initial location et al.,

Jackie
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Old   July 4, 2003, 07:22
Default Re: Particle tracing and Re
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Bob
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Are you using CFX4, 5.5.1 or 5.6 ? Particle tracking is now included in CFX5.6 not in CFX551 bob
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Old   July 4, 2003, 13:13
Default Re: Particle tracing and Re
  #5
Jackie
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Thank you bob, I allready have CFX5.6.but I still have no idea how to do that . Could you give me some idea?

Thank you very much, Jackie
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Old   July 7, 2003, 08:30
Default Re: Particle tracing and Re
  #6
Michael Bo
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In cfx5 you can add a point (Create\Point...\), and then create a streamline that uses that point(Create\Streamline\ Locations:Point 1) as a start.

Michael Bo
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Old   July 8, 2003, 22:30
Default Re: Particle tracing and Re
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zdong
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That is exactly the way I said... But I have not tried multiphase flow...
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Old   July 9, 2003, 15:35
Default Re: Particle tracing and Re
  #8
chris
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Hello,

Streamlines correspond to particles of zero mass. If you want to simulate particles with non-zero mass use the Lagrangian Particle Tracking as described in the new "Butterfly Valve" Tutorial of CFX5.6.

Chris
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Old   August 11, 2003, 23:12
Default Re: Particle tracing and Re
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Paul
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My understanding is that you were not able to put the particle in the command file and track it in the flow. in order to do that, you can refer to one of examples of particle tracking of CFX4-4 (i am not sure what examples are available in CFX5). If you have further questions, I will give some details. good luck
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