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  • Users: longnguyen25
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  1. longnguyen25

    FVM and FEM

    I ‘m analysing some CFD model by Fluent. And the algorithm in Fluent is FVM ( Finite Volume Method). I found in some fluid dynamics book that in CFD problem the FVM is better than FEM. But they didn’t speak clearly. I want to know the strong point and the weakness of FVM in comparison with FEM...
  2. longnguyen25

    CFD problem using FEM, Understanding the Fluid element?

    I 'm sorry.My question was not clearly. It is laminar incompressible flow in static case.And I want to know how to build the approximate equations to solve Navier-Stock equation. In particular I need the matrix formula of Fluid141/142-element in Ansys application. Thank you very much!
  3. longnguyen25

    CFD problem using FEM, Understanding the Fluid element?

    I analysis CFD problem by using FEM.And Ansys/ Flotran is a helpful application. Now I plan to programming to solve this problem by using Matlab. But I can’t not build the system of equations [K].{q}={c} because I haven’t got all of the matrix formulas for both 2-D and 3-D fluid elements. I...
  4. longnguyen25

    Using Block Lanzcos or Subspace for result is better

    Thanks a lot!
  5. longnguyen25

    Using Block Lanzcos or Subspace for result is better

    Can you tell me why you use Block Lanzcos?Or suppose you like its
  6. longnguyen25

    Using Block Lanzcos or Subspace for result is better

    I am meetting impediment in select Subspace method and Block Lanczos methodIn task simmers number riêng. Block Lanczos, first mode equal zero. Subspace mehtod, first mode don’t equal zero. Result of two different methods is different. Neither know I am have to who blunder where Neither, waitted...
  7. longnguyen25

    Thanks a lot!

    I am meetting impediment in select Subspace method and Block Lanczos methodIn task simmers number riêng. Block Lanczos, first mode equal zero. Subspace mehtod, first mode don’t equal zero. Result of two different methods is different. Neither know I am have to who blunder where Neither, waitted...
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