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Found 4 results

  1. Hello I actually work in SPH and I would like to create pressure graphs with Hypergraph. Usually, in hyperwork, to have this kind of data, you put pressure sensor into element, which is logic since you make pressure calculation in a volume. But, when you visualize results with HyperView, you can see the pressure evolution, so it should be possible. But, in SPH, there is no element, only nodes. So how can I input pressure sensor into hypermesh, to be able to view them with hyperGraph, after a radioss calculus ? So how or which sensor do I need, where to get it, or which modification should I change in the 0000.rad to be able to have those graph under hyperGraph2D in SPH model Sorry for any poor english, I am french, thank you very much in advance Regards
  2. Hi everybody i would perform a simulation of a lifeboat ditching, like in the tutorials where is used an ALE approximation, but using the SPH approximation, smoothed particle hydrodynamics. Does anyone know how build a sph model in hypermesh and solve it with radioss? Are any kind of tutorial about SPH simulation online? i was not able find it anywhere... Thank you!!!
  3. Good evening to every body i'm working on sph modelling of water; to obtain reasonable time step i have to use an artificial bulk modulus in the MAT LAW 6. I have found in the Monagham teory that it should be chosen using an artificial (lower of the real one) sound of speed that should be at least 10 times the maximum phenomena speed. I'm testing a water entry of a wedge, and the water surface imapact speed is 3 m/s. The water tank is in complete rest situatuion. Is this speed that i should use as "maximum speed of phenomena"? Thanks
  4. Hi guys I'm trying set up a model of a ditching body in water, modelling Water by Smoothed Particle Hydrodynamics. And i would like to model just an half of entire model applying symmetry conditions. By using /SPHBCS card for the sph symmetry conditions, i select a frame i have previously created, that defines the symmetry plane by the /DIR value. But running radioss it gives me this error ERROR ID : 400 ** ERROR IN SPH CONDITIONS (FRAME) DESCRIPTION : UNDEFINED REFERENCE FRAME ID=1 What could be the reason? maybe i mistake something creating the system or imposing symmetries for SPH elements? Thanks to All D.M
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