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Recent content by ybzh

  1. ybzh

    Need help on nonliear material model constants?

    Thank you all for the kind pointers. I appreciate the suggestions.
  2. ybzh

    Need help on nonliear material model constants?

    Hi, I am modeling a microvalve made of PDMS, and I need to find the Mooney-Rivlin Hyperelastic Material Constants of this hyperelastic material (I am using a 2 parameter Mooney-Rivlin model). Does anyone know the two parameters? Or can someone point me where to find these information? Thank...
  3. ybzh

    Need help on nonliear material model constants?

    Dear all, I am using Ansys to model a micro device which contains deformation of a Polydimethylsiloxane (PDMS) Elastomer. I want to use HYPER56, HYPER58 to model this hyperelastic material, but I can not find the Mooney-Rivlin Hyperelastic Material Constants (I am using a 2 parameter...
  4. ybzh

    pressure distribution for an orifice flow

    Thank you so much, MikeHalloran. These are very useful informations! You are really an expert. I also looked into a book "Handbook of Hydraulic Resistance", which is a very good book, but I did not get the information on pressure profile. Seems I have do just use simulate pressure...
  5. ybzh

    pressure distribution for an orifice flow

    Basically I want to model a valve using the orifice flow model. Water is used as the fluid. The temperature can be taken as room temperature. The downstream pressure is zero. The upstream pressure is from 0 to 100 kPa. The microchannel has a cross section about 300 by 300 micron. There are...
  6. ybzh

    pressure distribution for an orifice flow

    Hi, all, I am modeling an orifice flow (flow through a small hole in a microchannel) using CFD software. I have simulated the pressure distribution near the orifice and the pressure distribution on the plate. Now I want to compare the simulation result to the theoretical result. Can...
  7. ybzh

    Need help to start and run ansys 10 after installation.

    I used Ansys 9 a lot before, and I am trying to model a FSI problem with Ansys 10 since it is better for FSI. But after installation of Ansys 10, when I run Ansys, the following error pops up: "Error execting Ansys. Refer to system-related error messages in the ansys online help. If this...

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