ABSTRACT: A numerical investigation of heat transfer has been done in a corrugated cavity with heated thin plate
which located at different vertical locations and different angles. The enclosure with five corrugated numbers ,and
its wall temperature (Tc), and the insert body surface maintained at a constant temperature (Th). A two-dimensional
solution for steady laminar flow is obtained by solving governing equations by (ANSYS 16.0). The present natural
convection study is carried out based on the values: Rayleigh number ( ), sinusoidal cylinder base radius
ratio to plate length ( , and the inclination angles varied ( ). The results indicate that at
high (Ra) number and the ratio =0.5, have significant effects fluid flow strength (i.e increases by 0.536%),
Also the internal body must move downward when the heated plate at angle with vertical direction to maximum
increase in fluid flow strength.