i do elctrical ,thermal,flow simulation of 3D heating cell of 0.06m in diameter, and 0.28m in length how much and what type of mesh that i can use to achieve good results thanks in advance sihat

I'm not quite sure what you mean by "good results". But as far as meshing scheme is concerned, I think you could use "Cooper" (in Mesh->Volume) to mesh your geometry. To determine if your result is mesh dependent, you could compare results of different number of grids and see if there is any difference. Hope this helps.

Ken