Results 241 to 250 of about 147,583 (292)

Hydrodynamic Coefficients for Straked Risers

Volume 6A: Pipeline and Riser Technology, 2014
A considerable challenge in deep water field developments is the possibility of Vortex Induced Vibrations (VIV) of flexible risers due to presence of high currents. The most common remedy is the use of VIV suppression devices such as helical strakes. The background for this study is the lack of guidelines for estimation of hydrodynamic ...
Arne Nestegård, Per Erlend Voie, Nils Sødahl   +2 more
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Hydrodynamics and Transport Coefficients

2021
One of the major applications of the holographic correspondence in strongly interacting plasmas is the characterization of transport of conserved quantities, such as energy-momentum, charge and angular momentum. Magnitude of these currents are determined by the associated transport coefficients that quantify dissipation in the system, such as shear and
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Bridge Piers—Hydrodynamic Force Coefficients

Journal of the Hydraulics Division, 1968
The forces experienced by models of three different types of bridge piers have been measured for angles of inclination between the stream flow and the pier axis in the range 0○ to 50○, and the results are presented in the form of drag coefficients and lift coefficients.
Colin J. Apelt, Lewis T. Isaacs
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Hydrodynamic friction coefficients of coated spherical particles

The Journal of Chemical Physics, 2009
The complete set of hydrodynamic friction coefficients for a spherical particle coated with a porous layer and immersed in a viscous fluid is evaluated in analytic form. The coefficients allow the calculation of the flow disturbance caused by the coated particle for any incident flow which satisfies the creeping flow equations.
B, Cichocki, B U, Felderhof
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Hydrodynamic coefficients for vertical composite cylinders

Ocean Engineering, 1984
Abstract An efficient method of calculation for vertical, composite cylinders at finite depth is presented. Hydrodynamic coefficients calculated by this method are compared with numerical results obtained by a surface element method.
S.M. Calisal, T. Sabuncu
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Quantifying Hydrodynamic Coefficients of Complex Structures

OCEANS 2007 - Europe, 2007
This paper provides a comparison between calculating hydrodynamic coefficients based on engineering publications or by using computational fluid dynamics [CFD]. The CFD examines various computational codes and compares how the various turbulence models examined performed, as well as the effect of grid refinement on the resultant hydrodynamic ...
Richard P Irwin, Christian Chauvet
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Hydrodynamic Coefficients For Macrd-Roughnesses

Offshore Technology Conference, 1981
ABSTRACT Consideration is given to the drag of cylinders in fluid flow as influenced from the very large and lumpy roughnesses of marine growths. A means of characterizing the effective diameter is based on the Strouhal number of the roughened cylinder.
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Hydrodynamic Coefficients for Risers With Strakes

21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 1, 2002
Drag and inertia coefficients for offshore risers with strakes have been derived from model tests, and are reported in this paper. The coefficients correspond to flow conditions of forced oscillations with tow in the transverse direction, and without tow. For the forced oscillations the Keulegan-Carpenter (KC) range was 1 to 5.
Kostas F. Lambrakos, Michael S. Trianafyliou, Thanos Moros   +2 more
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Hydrodynamic approximation for distinct diffusion coefficients

Journal of Solution Chemistry, 1986
The distinct diffusion coefficient is a measure of the coupling of the diffusive motions of two particles. It is given as the integral over a velocity cross correlation rather than the velocity self correlation that determines the self-diffusion coefficient. A hydrodynamic approximation for the distinct diffusion coefficient is proposed and then tested
Harold L. Friedman, R. Mills
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Hydrodynamic Coefficients for an Extraterrestrial Submarine

Volume 7: Fluids Engineering, 2019
Abstract An autonomous submarine design was proposed as part of NASA’s NIAC program to explore the hydrocarbon seas of Titan, the Saturnian moon, and study its hydrological cycle. The submarine is to be capable of operating at both the surface and in a deeply-submerged mode.
Iskender Sahin, Peter Garrison, Shafquat Islam, Ona Thornquist, Hani AlHasni   +4 more
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