Learning Forum

[Maurok13]

in context currently i'm doing simulations of a jet impingment in transient state, according with my 3D model i decided to use a little time step of 1e-6 seconds in order to capture all efect of the physic's problem, i have a little computer machine with 4 proccesors (intel i-5 8th gen), and the time to perform a total analys is around 7 days, also i want to trial with another models of turbulence (SST, k-e, etc.) and methods of coupling the pressure-velocity (SIMPLE, PISO, COUPLED) and after that trial i need to perform a DPM-Erosion analysis, so..... i'm have null knowledge about clustering i've reserch something in ANSYS'S manuals and internet, and i undertood that i need a switch with ethernet cables to make the conection of the computers (i have 4 computers with the same specifications) but right now i dont know if this is feasible or a wrong way to accelerate my simulations, does any one can help me with this or give me some recomendations to improve the analysis, thanks..... so much n

[Rob]

In theory yes, and you're looking at building a Beowulf cluster. That's old school so you'll probably find info on that on line or in books. However, if you do link the PCs up that way you also need to account for interconnect speed in the calculations: if the interconnect is slow you may find adding another box actually slows down the calculation. nHave a look at the 3d model, can you use symmetry to reduce the cell count. Also look at the mesh to see if you're wasting cells in regions you don't need them. Check cell count, you'll not usually see much speed up beyond 50-100k cells per core, that's model and hardware dependent hence the range. nAlso check how many licences you have access too: no point doing all the work if you can't then use it! n

[Maurok13]

Hi Rob and thank you so much for the reply, i've think about to make an symmetrical analysis but my simulation also need to take account an angular velocity in the wall of the nozzle to make an swirling flow in three differents ranges, it will be a restriction for an symmetrical analysis? by last i need an extra licience to make an parallel analysis? MPI? does ANYSYS enterprise allow to conect more computers with a switch?.thanks for the support n