Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by slll

  1. slll

    What supersonic aerodynamics phenomenon is seen here?

    I am still curious. I will myself ask some colleagues about it.
  2. slll

    What supersonic aerodynamics phenomenon is seen here?

    That's right. However I doubt the gases from the retro engives can propagate upstream to the nose of the rocket. At this location, the flow is clearly downstream and at Mach number around 2-3 as indicated by the shock angle. I would favor an optic explanation, involving the change of density...
  3. slll

    Impose displacement on only one node of the FEM mesh

    Ok thanks, I also see that using an elastic-plastic material can also help going around the problem. I'll see if I can improve that, or if the whole thing is just a bad idea.
  4. slll

    A wing helping to improve aircraft fuel economy

    One more time a wing tip device is supposed to bring astonishing fuel savings... A couple of observations : * The guy started from the worst case of a rectangular wing without any tip fairing (first picture). This kind of wing tip dissipates more energy because of non-optimal distribution of...
  5. slll

    What supersonic aerodynamics phenomenon is seen here?

    It is a conical shock wave originating from the nose of the rocket at supersonic speed (see "shock wave" on wikipedia). What I don't understand is what phenomenon makes it visible on this picture. Sylvain
  6. slll

    Impose displacement on only one node of the FEM mesh

    Actually the idea is not to simulate something real but to use linear elasticity in order to perform interpolation between known displacements vector of a cloud of points. The cloud of points are considered part of an elastic continuum, supposed to deform under the effect of their imposed...
  7. slll

    Impose displacement on only one node of the FEM mesh

    Hi experts, I am experimenting with a FEM package and try to solve a very simple static linear problem : Take a sphere made up of solid linear isotropic elastic material. Impose : - zero displacement on the boundary of the sphere and - arbitrary displacement to the node located at the center...

Part and Inventory Search