A framework for epistemic uncertainty quantification of turbulent scalar flux models for Reynolds-averaged Navier-Stokes simulations

2013 ◽  
Vol 25 (5) ◽  
pp. 055105 ◽  
Author(s):  
C. Gorlé ◽  
G. Iaccarino
Keyword(s):  
Uncertainty Quantification ◽  
Epistemic Uncertainty ◽  
Navier Stokes ◽  
Scalar Flux ◽  
Reynolds Averaged Navier Stokes

Reynolds-averaged Navier–Stokes simulation of hydrofoil effects on hydrodynamic coefficients of a catamaran in forced oscillation

2016 ◽  
Vol 231 (2) ◽  
pp. 364-383
Author(s):  
Amin Najafi ◽  
Mohammad Saeed Seif
Keyword(s):  
High Speed ◽  
Experimental Approach ◽  
Navier Stokes ◽  
Hydrodynamic Coefficients ◽  
Laboratory Equipment ◽  
Factors Affecting ◽  
High Frequencies ◽  
Frequency Independent ◽  
Reynolds Averaged Navier Stokes

Determination of high-speed crafts’ hydrodynamic coefficients will help to analyze the dynamics of these kinds of vessels and the factors affecting their dynamic stabilities. Also, it can be useful and effective in controlling the vessel instabilities. The main purpose of this study is to determine the coefficients of longitudinal motions of a planing catamaran with and without a hydrofoil using Reynolds-averaged Navier–Stokes method to evaluate the foil effects on them. Determination of hydrodynamic coefficients by experimental approach is costly and requires meticulous laboratory equipment; therefore, utilizing the numerical methods and developing a virtual laboratory seem highly efficient. In this study, the numerical results for hydrodynamic coefficients of a high-speed craft are verified against Troesch’s experimental results. In the following, after determination of hydrodynamic coefficients of a planing catamaran with and without foil, the foil effects on its hydrodynamic coefficients are evaluated. The results indicate that most of the coefficients are frequency-independent especially at high frequencies.

scholarly journals Identification of severe wind conditions using a Reynolds Averaged Navier-Stokes solver

2007 ◽  
Vol 75 ◽  
pp. 012053 ◽  
Author(s):  
N N Sørensen ◽  
A Bechmann ◽  
J Johansen ◽  
L Myllerup ◽  
P Botha ◽  
...  
Keyword(s):  
Navier Stokes ◽  
Reynolds Averaged Navier Stokes
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