Recent content by ulfaazmi

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    Compressible flow or incompressible flow equation?

    I want to get the result of velocity, pressure, and temperature after iteration until reaching steady state and make a simulation using Fortran. But, I don't know whether the illustration of horizontal pipe is correct or not, because it is nonsymmetric. If I illustrate in a half of pipe like the...
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    Compressible flow or incompressible flow equation?

    I am so sorry about that. Actually, I did not find any tool to send an attachment directly from here. So, as you mentioned like "imgur", I tried to upload my images there, and this is the link "https://imgur.com/a/zFtoldc". I hope it can be loaded. Thank you very much.
  3. U

    Compressible flow or incompressible flow equation?

    I attached my picture file in this link (https://drive.google.com/drive/u/0/folders/1CTWibwiW33ngNlEEWQLOIKGgMj5I9-sv), I am really pleasure if you would like to help me. Thank you very much.
  4. U

    Compressible flow or incompressible flow equation?

    Thank you for your help Thank you for your help, actually I have problem to get the correct equation of my study. I am difficult to converting the equation into the non dimensional system because the condition is not clear yet. If it doesn't bother you, would you like to check my equation, I...
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    Compressible flow or incompressible flow equation?

    Thank you for your help, actually the driving force of flow is caused by pressure. So, initially the flow is in a steady state in a closed horizontal pipe until pressure is introduced into that flow caused by a high speed projectile hits the wall of pipe. It also affecting temperature becomes...
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    Compressible flow or incompressible flow equation?

    Hello everyone.. I am using 2-dimension Navier Stokes equation, but I confused that my problem is compressible or incompressible flow form, because if I have initial pressure and temperature and velocity for x-axis only in one grid that they are so very high but the others grid are zero. Can I...
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    How to understand dimensionless data of MacCormack's method

    Dear, everyone.. I am doing a numerical investigation of unsteady heat transfer in a Newtonian fluid occupying a square cavity. I solved numerically using HSMAC(Highly Simplified Marker and Cell) finite difference approach as the governing dimensionless equation. The fluid flow is simulated...
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    Fortran How to buy Fortran Programming Software Commersial License

    Hello,, I want to know how to buy the Fortran software,? I use Fortran programming to simulate some my work for my study. Do you have any suggestion about that??
  9. U

    Testing floating point numbers for equality

    I have tried it and success. thank you very much.
  10. U

    Testing floating point numbers for equality

    thank you for your advices and help. I will do it.
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    Testing floating point numbers for equality

    Anybody can help me?? The problem is when the value of (r1o = r, and r2o=r), the result will be infinite,,,what the the probably test for this case?? I can't test floating point numbers for equality ( if r == 0.5 and r == -0.5). But, when running this program without test floating point, it...
  12. U

    Fortran Fortran for Computational Fluid Dynamics Problems

    Thank you I study of energy flow when a projectile impact on a target in nitrogen, the experiment is carried out using a 2- stage light gas gun. The impact reactions produce smoke or hot gas plume. In this case, my supervisor already got several experimental data about the hot gas plumes and...
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    Fortran Fortran for Computational Fluid Dynamics Problems

    Dear, Mr.Nidum Actually, I have to finish my study in two years, but now I only have a time about 1,5 years left. What do you think about it? Does it make a sense? I am still studying fluid mechanics and computer programming and the others as you said that. Indeed, it is hard enough to study...
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    Fortran Fortran for Computational Fluid Dynamics Problems

    Thank you very much for your information, I am glad you may help me. I have checked the websites and it's good and will be helpful for me. I will study it well. Thank you.
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