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projection method(3D)Hi
I want to simulation the flow in helical pipe. I have one Continuity equation and three momentum equations in s=>(u),r=>(v),teta=>(w). I used staggered mesh and descritized all of terms in central(finite difference). I want to use projection method for solution these navier-stokes equations. first problem:What is stability condition for helical coordinates (three dimensional)in projection method?because I don’t know which number of interval in s,r,teta causes convergence! second problem :In descritized scheme we have i+2,i-2,j+2,j-2,k+2,k-2 indexes for u,v and w. what do I have to do for the nodes of near the boundary? It means that two nodes produced out of domain but I don’t know value of them and they are unknowns. Third problem:We have to apply boundary conditions.in s and teta I have to apply periodic Conditions.what are periodic boundary conditions for u,v and w in s and teta? Is there any paper or books(references) for programming of projection method(three dimensional)? Thanks for your guidance and aid |

Quote:
The ghost cells may also help in imposing periodic boundary conditions. |

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