This paper examines the numerical work of thermal convection over tube banks with winglets through heat exchanger in two parts under turbulent conditions. The first section investigates influence two-phase (water and air) flow on performance kinds vortex generators (Delta Rectangular) across oval banks. second studied four types (Delta, Rectangular, Zikzak, Sinusoidal wavy), circular tubes, for...

INTRODUCTION Peritoneal loose body(PLB) is usually small, therefore giant Peritoneal loose body(gPLB) with a diameter >5cm has rarely been described in the literatures. We report a case of two gPLB simultaneously found in one patient. PRESENTATION OF CASE A healthy 79-year-old man palpated himself a solid mass with alternating localizations in his peritoneal cavity 6 months ago. It was not th...

As the solidification reaches hot spot area, no molten metal remains and shrinkage is formed. To anticipate shrinkage, a riser added to casting system. An optimal design would produce free components. One of factors that affect efficiency shape. This study aims find most efficient side shape by using simulation software. The tubes, tubes with half sphere on top, hemispheres, conical an oval cro...

The use of Perfobond Leisten (PBL) shear connectors in building structures has attracted increasing interest. A new approach for using perforated steel plates concrete-filled tube (CFST) column splices was implemented this study. shape the perforation opening is generally a circle, similar to that PBL connectors. However, study, an oval-shaped used increase double area concrete. pull-out experi...

This work reveals the heat transfer and flow characteristic in a twisted oval tube under turbulent constant flux conditions. Numerical analyses were carried out on several configurations. In order to clearly reveal effect of dimples swirl flow, tubes with without are considered. enhance convective transfer, placed narrowing region where was inefficient. The results indicate that significantly i...

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