8 research outputs found
Numerical Simulation of Incompressible Turbulent Flow using Linear Eddy Viscosity-based Turbulence Models
Get PDFThe present study focuses on the recent development of an implicit pressure-based finite volume algorithm for numerical solution of Reynolds averaged Navier-Stokes equations (RANS) in an inertial frame of reference for the prediction of unsteady incompressible flow problems. The algorithm uses boundary-conforming, multiblock structured grid with moving boundaries, collocated variable arrangement with momentum equations resolved along cartesian directions, second-order accurate spatial and temporal discretisation schemes for the convective fluxes and a pressure-velocity solution strategy. Effect of turbulence was simulated using appropriate linear eddy viscosity-based turbulence models. The capabilities and limitations of the cost-effective unsteady Reynolds averaged Navier-Stokes (URANS) approach has been demonstrated for few application problems of engineering interest.Defence Science Journal, 2010, 60(6), pp.614-627, DOI:http://dx.doi.org/10.14429/dsj.60.60
LES of Flow past Circular Cylinder at Re = 3900
No full textTransitional flow past a circular cylinder in the lower subcritical regime (Re = 3900) has been analysed using Large Eddy Simulation (LES) coupled to Smagorinsky and dynamic sub grid scale models. These simulations have been carried out using a parallel multiblock structured finite volume
code which is based on SIMPLE algorithm. The predictions are validated against detailed measurement data for mean as well as turbulence quantities. The present LES prediction in general agree
reasonably well with the measurement data in the near wake region but deviates from the measurement data in the far wake region which may be due to the coarse resolution of the grid in this region.
The influence of the SGS model on mean flow quantities as well as on the flow structures are also
discussed
<span style="font-size:15.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">First record of <i>Halophila ovalis</i> in the Haripur creek, East Coast of India</span>
No full text1939-1941<span style="font-size:9.0pt;font-family:
" times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;color:black;mso-ansi-language:en-gb;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-GB">Present study reports the first record of occurrence of a
seagrass Halophila ovalis, family- Hydrocharitaceae and class-Liliopsida
in the Haripur creek of the southern coast of Odisha. It was suggested that the shallow water
region of this tidal creek provided a conducive environment for colonization of
this particular sea grass species. This study also describes the morphological
and habitat characteristics of the sea grass.</span
<span style="font-size:15.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">First record of <i>Halophila ovalis</i> in the Haripur creek, East Coast of India </span>
No full text118-120Present study reports the first
record of occurrence of a seagrass Halophila ovalis, family-
Hydrocharitaceae and class-Liliopsida in the Haripur creek of the southern
coast of Odisha. It was suggested that the shallow water
region of this tidal creek provided a conducive environment for colonization of
this particular sea grass species. This study also describes the morphological
and habitat characteristics of the sea grass
