###
2018 : Numerical simulation of cross flow around four circular cylinders in an in-line square configuration with the critical spacing ratio “L/D” near a plane wall

Prof. Dr. Ir. Tri Yogi Yuwono DEA.

Abstract

Flow cross around four circular cylinders arrangement near a plane wall could be found in many engineering application such as subsea pipeline, shell and tube heat exchangers, and tube banks, etc. When flow crosses the bodies, it would form a particular flow pattern according to the bodies arrangement. The objective of this research is to study numerically the effect of gap (G) on flow characteristics around four cylinders placed near a plane wall. Gap ratio (G/D) is defined as ratio between a distance of the wall to a surface of the bottom of the lower cylinders (G) and the cylinder diameter (D). It is varied of 0.2, 0.3, 0.5, 0.7, 1.0 and 1.5 with critical spacing ratio L/D (where L is a distance of cent re of cylinders) is fixed at 2.7. A numerical simulation with two dimensional Unsteady Reynolds Averaged Navier-Stokes equations and k-ω SST turbulence model is solved with a finite volume method has been applied toÂ …