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Discrete vortex model. Part 1

Abstract

A numerical model to study the time development of a two-dimensional turbulent flow around cylinders and the associated forces has been developed. The model is based on the discrete vortex method. The development of the turbulent boundary layer around the cylinders is included in this investigation. The boundary layer calculation is based on von Karman`s momentum equation, where the shape of the velocity profile in the boundary layer is assumed to be logarithmic. Only two-dimensional flow is considered. The vorticity equations are solved in a curve linear coordinate system. The curve linear coordinate system is generated from the Laplace equation. The coordinate lines are the streamlines and potential lines. The equations allow solution for a configuration of several cylinders. (au) (11 refs.).
Publication Date:
Jun 01, 1990
Product Type:
Miscellaneous
Report Number:
NEI-DK-868
Reference Number:
SCA: 423000; PA: DK-92:001464; SN: 92000738452
Resource Relation:
Other Information: DN: EFP-88; PBD: Jun 1990
Subject:
42 ENGINEERING; TURBULENT FLOW; OFFSHORE PLATFORMS; CYLINDERS; MATHEMATICAL MODELS; TWO-DIMENSIONAL CALCULATIONS; COMPUTERIZED SIMULATION; 423000; MARINE ENGINEERING
OSTI ID:
10144572
Research Organizations:
Dansk Hydraulisk Inst., Hoersholm (Denmark); Ramboell og Hannemann, Raadgivende Ingenioerer A/S, Virum (Denmark); Lic Engineering A/S, Hellerup (Denmark); Skibsteknisk Laboratorium, Lyngby (Denmark); Danmarks Tekniske Hoejskole, Lyngby (Denmark). Inst. for Stroemningsmekanik og Vandbygning; Danmarks Tekniske Hoejskole, Lyngby (Denmark). Inst. for Skibs- og Havteknik
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE92518888; CNN: Contract EM-1313/88-15; TRN: DK9201464
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
DK
Size:
109 p.
Announcement Date:
Jul 05, 2005

Citation Formats

None. Discrete vortex model. Part 1. Denmark: N. p., 1990. Web.
None. Discrete vortex model. Part 1. Denmark.
None. 1990. "Discrete vortex model. Part 1." Denmark.
@misc{etde_10144572,
title = {Discrete vortex model. Part 1}
author = {None}
abstractNote = {A numerical model to study the time development of a two-dimensional turbulent flow around cylinders and the associated forces has been developed. The model is based on the discrete vortex method. The development of the turbulent boundary layer around the cylinders is included in this investigation. The boundary layer calculation is based on von Karman`s momentum equation, where the shape of the velocity profile in the boundary layer is assumed to be logarithmic. Only two-dimensional flow is considered. The vorticity equations are solved in a curve linear coordinate system. The curve linear coordinate system is generated from the Laplace equation. The coordinate lines are the streamlines and potential lines. The equations allow solution for a configuration of several cylinders. (au) (11 refs.).}
place = {Denmark}
year = {1990}
month = {Jun}
}