Arnau F. J.

Forum Replies Created

Viewing 13 posts - 1 through 13 (of 13 total)
  • Author
    Posts
  • June 28, 2017 at 2:22 pm in reply to: modelling of si engine #786
    F. J. ArnauArnau F. J.
    Keymaster

    I don’t know paper related with this. We never have modelled SI engines with openwam. But you use a wiebe function for combustión and inject in the chamber the corresponding fuel to get relative fuel to air ratio similar to one like SI engines. The main difference is the combustion process, the rest of elements are similar.

    June 28, 2017 at 11:14 am in reply to: modelling of si engine #782
    F. J. ArnauArnau F. J.
    Keymaster

    I’m not sure if the model is ready to simulate SI engines. You cannot inject fuel outside the chamber. Probably you need some tricks to model this type of engine.

    April 11, 2017 at 4:41 pm in reply to: Instantaneous Data File Missing #778
    F. J. ArnauArnau F. J.
    Keymaster

    Sorry, I don’t know any quick solution. I think that the only way to solve the problem is to look for the bug in the code and recompile it. You have the source code available. I don’t know if you are able to do this.

    April 5, 2017 at 5:16 pm in reply to: Instantaneous Data File Missing #774
    F. J. ArnauArnau F. J.
    Keymaster

    Probably you get an error that says something like… “the file is open and it cannot be written”. It is an strange error that happens in some computers using MS Windows.

    April 4, 2017 at 5:00 pm in reply to: Instantaneous Data File Missing #770
    F. J. ArnauArnau F. J.
    Keymaster

    Have the simulation finished correctly?

    March 21, 2017 at 6:17 pm in reply to: Ethanol fuel mix, case setup and injection type #768
    F. J. ArnauArnau F. J.
    Keymaster

    Using wiebe functions you are imposing the combustion. If you modify any parameter in the engine that can affect the combustion, the model won’t predict this change in combustion process.

    March 8, 2017 at 7:38 am in reply to: Ethanol fuel mix, case setup and injection type #766
    F. J. ArnauArnau F. J.
    Keymaster

    The best option to simulate the combustion is to provide the heat release rate. You can use a combination of 4 Wiebe function to fit the real heat release rate. As I said, in this moment is not possible to have different cases in the same file.
    Openwam is a good tool to predict the effect of geometry or valve timing in volumetric efficiency, but it is not able to predict the effect of these changes in combustion.

    March 7, 2017 at 3:47 pm in reply to: Ethanol fuel mix, case setup and injection type #763
    F. J. ArnauArnau F. J.
    Keymaster

    In this moment, openwam is not able to run with ethanol. It is ready for diesel. Even gasoline could provide wrong results.
    To generate different cases you need create different files for each case where you have to change some parameters not only the speed (fuel mass, initial pressure and temperatures…)

    February 2, 2017 at 8:54 am in reply to: Dual Fuel set #759
    F. J. ArnauArnau F. J.
    Keymaster

    Hi Carlo. In this moment OpenWAM is not ready to work with dual fuel but you are free to modify the code in order to implement this capability.

    September 12, 2016 at 11:29 am in reply to: error launching execution #747
    F. J. ArnauArnau F. J.
    Keymaster

    Have you configured the location of the openwam.exe ??

    • This reply was modified 9 years, 6 months ago by F. J. ArnauArnau F. J..
    September 12, 2016 at 10:09 am in reply to: error launching execution #745
    F. J. ArnauArnau F. J.
    Keymaster

    Are you using the .wam or the .pcs file?

    August 12, 2016 at 4:58 pm in reply to: OpenWAM 2.1 released #742
    F. J. ArnauArnau F. J.
    Keymaster

    It is a very strange result but our institution is on holidays during August and we cannot check what is causing that issue.

    February 18, 2016 at 11:47 am in reply to: Coupling to OpenFOAM #734
    F. J. ArnauArnau F. J.
    Keymaster

    I know people that connected OpenWAM and Fluent some time ago and it worked. I think that both codes share a boundary conditions and exchange the information through a file. Anyway, I am not an expert in Fluent or OpenFOAM and I don’t know the modification that the code need to do correctly the communication between both tools.

  • Author
    Posts
Viewing 13 posts - 1 through 13 (of 13 total)

Comments are closed.