Master's thesis at the College of Engineering, University of Anbar discusses {{The effect of vortex generators in accelerating thermal diffusion within the Stoke layer}}

 Today, Wednesday, October 19, 2022, in the Department of Dams and Water Resources Engineering, a public discussion took place for a master’s student (Marwa Monem Saud Radi), a student in the Mechanical Engineering Department - College of Engineering - University of Anbar, about her thesis tagged: -

 {{ Effect of vortex generators in accelerating the thermal diffusion

 inside the Stocks boundary layer }}

 The main objective of the student's research proposal is to accelerate the radial and axial thermal diffusion across the Stokes boundary layer by combining the effect of vortices that can be generated by Vortex generators and the oscillating flow within the contiguous layer.

 The discussion committee consisted of:

 * Prof. Dr. Hamdi Imad El-Din Ahmed, Chairman

 * Prof. Dr. Essam Mohamed Ali, Member

 * Dr. Ahmed Ali Naguib as a member

 * Prof. Dr. Saad Muhammad Jalil, member and supervisor.

 The thesis included: - Study of convective heat transfer properties of fully developed forced turbulent flow in a circular tube equipped with delta vortex generators through numerical and experimental methods.  Rings bearing vortex generators rotated at three different rotation angles (0°, +20°, +40°).  Systematically measured thermal performance within the range of 2500 to 15,000 Reynolds number with a constant heat flux of 23500 W/m2 at the outer wall of the test tube using water as the working fluid.  The numerical model was also implemented to simulate turbulent flow in two states (stable flow and unstable flow) identical to those used in practical experiments.  The main governing equations are solved using the commercial software package ANSYS FLUENT-2021R2 - CFD with the application of terms limits necessary for simulation and compatibility with experiments Comparison with experimental results.

 The results showed: - The improvement in the heat transfer process in the steady state is better than the improvement in the unstable state.  The experimental results showed that the Nusselt number increases with the increase of the Reynolds number and that the coefficient of friction decreases with the increase of the Reynolds number.  The presence of vortex generators resulted in improved heat transfer.  The highest level of the Nusselt number was obtained when rotating the rings bearing the vortex generators at an angle of (20° ???? ???? = +).  Also, the highest level is PEC=1.7 at Re=2500 with a rotation angle of +20° for the rings.

 After extensive discussion by the discussion committee with the student, the thesis was accepted and with a satisfied score

 The discussion was attended by the Dean of the College of Engineering, Prof. Dr. Amir Abdel Rahman Hilal, the Associate Dean for Scientific Affairs, Prof. Dr. Mohamed Abdel Ahmed, and a number of professors and graduate students in the department.

 Congratulations to the student, our best wishes for the completion of the scientific journey ... and the discussion committee success and scientific advancement.