Author : Suja T P 1
Date of Publication :17th August 2017
Abstract: In and around the offshore industry, there are drastic developments in the construction of structures as well as in the analysis. In the design and analysis of most of the offshore structures, effect of other obstructions in the field is considered as a minor factor. But there is some influence on the force acting on the structures due to the presence of other neibouring structures. The concept of bluff bodies which is characterized by large amount of flow separation in the field of offshore structures. This work mainly focuses on the flow past bluff bodies. A 2-Dimensional steady state is considered for the simulation in the computational fluid dynamics. The flow domain considered is rectangular with appropriate boundary conditions. The fluid is assumed to be incompressible. k- ε turbulent model is used in the present work. Two dimensional Navier- Stokes equation is solved. Flow around single circular bluff body is simulated and the corresponding drag coefficient variation with respect to Reynolds number is studied. It is extended to two, three and four bluff bodies in the fluid flow. For the multiple bluff bodies, gap between them are changed to get the effect of gap on flow field. Reynolds number range chosen is 104 to107.
- B A Younis, P Teigen, V P Przulj; ‘Estimating the hydrodynamic forces on mini TLP with computational fluid dynamics and design- code techniques’; Ocean engineering 28 (2001) 585- 602
- B.K Gandhi et al, ‘Effect of bluff body shape on vortex flow meter performance’ Indian jrnl of engineering and material science (2004), volm 11, pp 378-384P.
- J.R. Meneghini et al, ‘Numerical simulation of flow interference between two circular cylinders in tandem and side by side arrangements’ jrnl of fluids and structures (2001)
- M Zhao et al, ‘Hydrodynamic forces on dual cylinders of different diameters in steady currents, Journal of fluids and structures (2007)
- S. Chandrasekaran , A.K. Jain; ‘Influence of hydrodynamic coefficients in the response behavior of triangular TLPs in regular waves’ ; Ocean Engineering 31 (2004) 2319–2342