Accession Number:

AD1004991

Title:

A Preliminary Validation of the RANS Code TASCflow Against Model Scale Submarine Hydrodynamic Data

Descriptive Note:

Conference Paper

Corporate Author:

Defence Research Establishment Atlantic Dartmouth, Nova Scotia Canada

Personal Author(s):

• Watt,George D.
• Knill,Kevin J.

Report Date:

1999-06-01

Pagination or Media Count:

9.0

Abstract:

A preliminary evaluation of the RANS code CFX-TASCflow for predicting the hydrodynamic forces on a fully appended submarine at a Reynolds number of 20 million is described. Except for drag, TASC flow makes good predictions of the overall forces up to moderate incidence angles using wall functions with a 371,000 node grid. At high incidence angles the predictions break down due to inadequate modeling of separation and shed circulation. The predictions improve with a finer grid and different turbulence models. Drag predictions improve when the boundary layer is modelled in place of wall functions.

Descriptors:

• hydrodynamics
• submarines
• Reynolds numbers
• validation
• models
• flow
• canada

Subject Categories:

• Fluid Mechanics
• Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE