| Biography | |
|---|---|
 Prof. Alam Md. Mahbub Harbin Institute of Technology (Shenzhen), China |
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| Title: Cylinder from square to circular: flow topology, heat transfer and forces | |
| Abstract: The flow and heat transfer topologies around isothermal circular and square cylinders have received a great deal of attention in many practical engineering applications such as electronic-chip cooling systems (processors and power chips), and turbine blade cooling systems. Particularly, due to technological developments of electronic components, cooling of chips on board is a fundamental issue to increase the service life or to avoid overheating. Design optimization and miniaturization of electronics components are always demanded in terms of heat transfer enchantment. A square cylinder has an infinite curvature at the corners and zero curvature on the surfaces, while a circular cylinder has a finite curvature (inverse of the radius) of the surface. Therefore, rounding the corners of a square cylinder from the corner radius ratio r/R = 0 to 1.0 leads to the formation of a series of cylinders, where r is the radius of the rounded corners and R is the half-width (R = W/2) of the square cylinder or the radius of the circular cylinder. The flow around and heat transfer from a circular cylinder (r/R = 1.0) are independent of the attack angle α due to an infinite-order rotational symmetry of a circular cylinder cross-section. On the other hand, those from a square cylinder (r/R = 1.0) are highly sensitive to α = 0 – 90 as a square cylinder cross-section has a fourth-order rotational symmetry. Thus, it is very important to understand the flow and heat transfer characteristics of a square or rounded square cylinder with changing attack angle α and r/R because of their practical significance. This lecture will encompass the effect of α and r/R on flow topology, heat transfer and forces, casting light upon correspondence between fluid dynamics and heat transfer mechanisms. | |
| Biography: Alam Md. Mahbub is a professor at Harbin Institute of Technology (Shenzhen) since 2012. He worked as a senior lecturer at the University of Pretoria (South Africa), research and postdoctoral fellows at the Hong Kong Polytechnic University, and lecturer at the Rajshahi University of Engineering and Technology (Bangladesh). He received MEng and PhD degrees from Kitami Institute of Technology, Japan, in 2001 and 2004, all in Mechanical Engineering. More than 270 technical articles are authored and co-authored, including 112 journal papers, most of which have been published in the top-notched journals, including Journal of Fluid Mechanics, Journal of Fluids & Structures, Physics of Fluids, and Journal of Sustainable and Energy Reviews. His papers received citations of 2083 (h-index 26) in SCI database and 3750 (h-index 31) in google database. He is the author of two books. He has edited three special issues in ‘Wind and Structures, an International Journal. Prof Alam has received a number of awards: Japan Government Scholarship (monbusho) for Masters and PhD studies; JSPS Postdoctoral fellowship; South Africa National Research Foundation (NRF) rating ‘Promising Young Researcher, Y1’; Shenzhen High-Level Overseas Talent; 2015 Shenzhen Outstanding Teacher. He is an editorial board member of ‘Wind and Structures, an International Journal’. | |
