An overview of Jadim

Introduction | The mesh | The different files | The results


Jadim solves incompressible, unsteady and 3-D Navier-Stokes equations with the Volum Of Fluid methods. To run a simulation, it needs to generate a mesh with several programs. After, paramaters concerning the fluid, the geometry or the simulation must be filled out into some files. Concerning the results, we used Matlab to see the presence rate of the different phases.
  To generate a mesh, it is quite easy, it needs just to enter the dimensions of a parallelepipede, the number of cells in each direction and an angle if there is an inclinaison in the problem, in a file called name.don (wher name is the name of the case). With th eroutine, gener1, it creates the file name.nume which contains the coordinates of the problem. The routine geonsm create the file name.genu and curnsm creates name.geom which are the files of geometry of the case. Finally, the program bord generates the file name.bord which contains the boundary regions.
  In fact, there are four files of parameters to run a simulation:

-The first one is name.para, where is everything concerning the calculus: timestep, number of iterations, unsteady or steady flow etc...
-The second one is name.phys where are stocked all the datas concerning the fluids: viscosity, volumic mass, thermodynamic coefficients etc...
-In name.limi, you have to enter the boundary conditions.
-It is name.datr you have to modify if there are interfacial transfers.
-Finally, initial conditions are in name.init.

Concerning the results, there are several files, but the main ones are res.tau and uvw.res. In the first one are the the presence rates, and you can visualize it with a small matlab program. In uvw.res, are the different coordinates of the velocity.

If you want further detailed information, it is possible to consult the manual on the mcip page.