  This paper presents the study and implementation of finite element method to
find the temperature distribution in a rectangular cavity which contains a
fluid substance. The fluid motion is driven by a sudden temperature difference
applied to two opposite side walls of the cavity. The remaining walls were
considered adiabatic. Fluid properties were assumed incompressible. The problem
has been approached by two-dimensional transient conduction which applied on
the heated sidewall and one-dimensional steady state convection-diffusion
equation which applied inside the cavity. The parameters which investigated are
time and velocity. These parameters were computed together with boundary
conditions which result in temperature distribution in the cavity. The
implementation of finite element method was resulted in algebraic equation
which is in vector and matrix form. Therefore, MATLAB programs used to solve
this algebraic equation. The final temperature distribution results were
presented in contour map within the region.
