2D CFD Bullet in a Pipe

This is a 2d CFD simulation of a supersonic bullet fired down a pipe, made using a special version of VH1 that can simulate flow around rigid objects.

Category:

Howto & Style

Tags:

• CFD
• Computational
• Fluid
• Dynamics
• Bullet

[medfexer]

The initial shockwave is non linear. Pipe or no pipe, there's a fly in the ointment.

[michaelpowen]

The bowshock is not supposed to be linear; the bullet is blunt-nosed, not pointed.

[AliquidDignum]

Very nice simulation! Can you share some more details abouthe solver, the mesh and the boundary conditions, please. Thanks!

[michaelpowen]

The mesh is straight cartesian, if I recall correctly (this simulation was made about 4 years ago). The solver is PPM-LR, piecewise-parabolic method (Collela & Woodward), with a Lagrangian remap. I honestly can't recall if this particular run was adiabatic or isothermal. The boundary conditions are simple reflection symmetry, even for the solid object.

[Ness1986]

Gharalam says he has not studied supersonic flow yet, and you answer him telling that "it's because of the SWBLI". He got you, be sure.

kiscky means Shock wave - boundary layer interaction.

cheers

[TheMrBlinx]

Fractals! (sort of :-)

[mrnil555]

watch it

[keresztul]

Nice vid, but in reality, bulletes aren't that no-moving stuff. They do quite a sophisticated movement.

[whotookmynickkokokai]

this fake..

[havayetaze]

HI,

would you please inform me what method did you use in your simulation. and what is the spacial and temporal order of accuracy.

regards

[ITAPEVI]

great vid

im bored on cam p7

[bhushi14]

I thnk due to the finiteness of the top and bottom boundaries, the shockwave is deflected downwards thus giving rise to vortices...am i right?

[bhushi14]

are u using a farfield boundary condition?

[kiscky]

cause of SWBLI.. look it up!!!