please brief out

1) the general differences between the FVM, FDM, FEM methods.

2) what are the diffrent schemes for dissipative and dispersive.

Sincere Thanks and Regards

RAJ

the second question, i image the answer is: dissipative mean consumptive,that is to say, the value of property will be less and less with time, so it will be likely to convergce . dispersive mean nondirectional, the value of property will disperse in all directions,such as both forward and backward in a flow. there are two diffent focus.

FDM-differentiation,easy to perform ,no need to select polynomial function,errorous when moving to nonlinear eqn.

FEM-formulation is difficult,converged,errors will minimize if we go to higer order formulations.

FVM:just like FEM but possible only for simple CV