[amit_100]

can any one given some basic insite of cyclic boundary condition?

[bscphil]

Hey Amit,

the cyclic boundary condition is a periodic boundary condition. This is usually use to reduce the mesh size of a rotationally symmetrical domain by cutting-out a piece (e.g for a 360 degree tube, you can only cut a 10 degree piece and set at the cutting planes the cyclic boundary condition).
This is for flows that are in a static sense constant in one direction, then you can set the periodic boundary conditions in these direction (p=zeroGradient @ cyclics, i think ?).

One example is e.g. a axial compressor stage grid... or this http://www.adina.com/newsgH75.shtml