Particularly i am having confusion in deciding boundary condition for swirl part.
Lets consider your problem is an incompressible flow problem with very low Reynolds number.
If you are going to place a circular lid on top of a container and rotate, the top portion of the fluid is going to experience the velocity
V=r * w
where r - radial location of the particle / grid point
w - angular velocity of the lid
the other parameters are going to be the same as that for 'lid over channel' flow.
Ok, but since the problem is of axisymmetric swirl (2d) type so i have to fix the x axis as the axis of symmetry and to follow the convention now my cylinder would be horizontal with lid over the left part (i think you can visualize what i am saying). Basically now my geometry is a rectangle of width 1.5 and height 1.
Now for that rotating lid with constant angular velocity, what would be the boundary condition for radial (v), axial (u) and swirl (w) velocity.
Hi sir,
I have taken the cartesian form of r-momentum, z-momentum and w-momentum (swirl) equation and have converted them to their respective cartesian form as r->y,z->x, Vr->V and Vz->U. After this kind of calculation i am now having some extra terms in my momentum equation which will account for source terms.
I have modeled that part, but still results are not matching with standard literature for lid-driven swirling flow in a confined cylindrical cavity. So my guess is the problem is may be in boundary condition part.
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