Bashar AbdulNour

An experimental and numerical study of heat transfer off an inclined surface subject to an impinging airflow

Abstract Understanding the heat transfer interaction between an impinging jet and an inclined surface is of paramount practical significance. In this paper, the heat transfer process is investigated utilizing a three-dimensional finite volume numerical method and renormalization group (RNG) theory based k–e turbulence model. The issuing incompressible jet is impinging upon the inside of an inclined surface creating a thermal boundary layer and a fully three-dimensional vortex structure. Numerical analyses predict a detailed description of fluid flow patterns and heat transfer coefficients. Experimental investigations are performed on the inner surface for the purpose of obtaining local and average heat transfer coefficients and further validation of the numerical results. The effect of different turbulence levels in the numerical solution is also reported.

DEFROSTING OF AUTOMOTIVE WINDSHIELDS: PROGRESS AND CHALLENGES

Climate control applications are of great interest to the automotive industry. The issue of windshield defrosting has received, and continues to receive, considerable attention from various investigators around the world. This paper presents an up-to-date assessment of our knowledge base on defrosting. It documents a comprehensive literature review covering experimental as well as computational efforts, accompanied by utilisation of electric heating elements, conducting films, and heat storage devices. The paper also presents a list of measurement methods for airflow and thermal patterns pertinent to defrosting. It concludes with an example on quick detection of a defroster system performance, recommends a defroster system development sequence, and addresses relevant future challenges.

An experience on Industry-University collaborative research

Industry-university collaboration is common at GMI Engineering & Management Institute, USA, a fully co-operative institution which requires students to write a fifth-year thesis on a project relevant to an industrial sponsor. While the undergraduate link between GMI and its industrial sponsors is strong, collaborating on higher level research projects is somewhat new. This paper documents the phases of a collaborative research experience between GMI Engineering and Management Institute and Ford Motor Company. It also presents the potential benefits to each party, describes appropriate relationships, and exhibits steps for continuing cooperation. The paper concludes with an outline for a successful collaboration and suggests ways to ensure a fruitful experience for both industry and university participants.

Computational Fluid Dynamics Analysis of the Flow in an APCVD Applicator System

Application of Atmospheric Pressure Chemical Vapor Deposition (APCVD) to the production of coated glass is addressed in this study. Several layers of thin films are deposited on the surface of the glass as it moves underneath the APCVD applicator system at high temperature. A memory effect in the form of film thickness streaks, corresponding to the location of the inlet holes located upstream in the upper manifold feed channel, is evident on the glass. This nonuniform film across the glass causes a color variation of the coating. Effective mixing of the gas streams is required to treat the hole memory problem. However, a premature reaction is to be avoided. Optimum design parameters to correct this problem include the geometry of the applicator and the sensitivity of the flow field to boundary conditions is of major interest. The Computational Fluid Dynamics (CFD) simulation and analysis package FIRE is used to predict the flow. The flow of gases involved is treated as that of a steady, viscous, incompressible fluid. Results for both two- and three-dimensional cases demonstrate that the deposition process can be improved by injecting the flow at an angle counter to the direction of glass motion, and that CFD techniques can be successfully used to predict the flow behavior of an APCVD applicator system and help optimize its design.