To demonstrate how a 2D formulation works well use the following steady AD equation in where is the known velocity field is the known and constant conductivity is the known force function and is the scalar unknown. But now at steady state meaning that the time derivative of the temperature field is zero in Eq. 1 Consider The Following Steady Incompressible Two Dimensional Velocity Field The idea of ergodicity was born in the field of thermodynamics where it was necessary to relate the individual states of gas molecules to the temperature of a gas as a whole and its time evolution thereof. . Formulation of FEM for Two-Dimensional Problems 31 Two-Dimensional FEM Formulation Many details of 1D and 2D formulations are the same. The domain equation for the model domain Ω is the following. 423 are given the drag force gravity force electrostatic force and. Consider the unsteady and free-convective stagnation point flow of an inc