scholarly journals Viscous Models Comparison in Water Impact of Twin 2D Falling Wedges Simulation by Different Numerical Solvers

2018 ◽  
Vol 9 (1) ◽  
pp. 1-13
Author(s):  
Mehdi Mahmoodi ◽  
◽  
Roya Shademani ◽  
Mofid Gorji Bandpy ◽  
◽  
...  
Keyword(s):  
Water Impact ◽  
Models Comparison ◽  
Viscous Models

On Resistance Calculation for Autonomous Underwater Vehicles

2011 ◽  
Vol 189-193 ◽  
pp. 1745-1748 ◽  
Author(s):  
Fang Xi Song ◽  
Lian Hong Zhang ◽  
Zhi Liang Wu ◽  
Le Ping Wang
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Autonomous Underwater Vehicles ◽  
Underwater Vehicles ◽  
Models Comparison ◽  
Computational Fluid Dynamics Cfd ◽  
Resistance Prediction ◽  
Viscous Models ◽  
Cfd Method ◽  
Comparison With Experiments

Investigation on the turbulence model for resistance calculation for autonomous underwater vehicles (AUV) with the typical Myring shape is presented in this paper using computational fluid dynamics (CFD) method. Resistance calculations of the 3D viscous flow over an AUV model are made by solving RANS equations with different viscous models. Comparison with experiments indicates that the SST k-ω two-equation viscous model is the most appropriate model for the resistance prediction.

Computation of the Bow Deck Design Pressure against the Green Water Impact

2019 ◽  
Vol 56 (4) ◽  
pp. 343-351
Author(s):  
Yong Jig Kim ◽  
Ki-Seok Shin ◽  
Seung-Chul Lee ◽  
Youngrok Ha ◽  
Sa Young Hong
Keyword(s):  
Green Water ◽  
Water Impact ◽  
Design Pressure

Water impact of a surface-patterned disk

2021 ◽  
Vol 915 ◽  
Author(s):  
Taehyun Kim ◽  
Donghyun Kim ◽  
Daegyoum Kim
Keyword(s):  
Water Impact

Abstract

A three-dimensional immersed boundary method based on an algebraic forcing-point-searching scheme for water impact problems

2021 ◽  
Vol 233 ◽  
pp. 109189
Author(s):  
Bin Yan ◽  
Wei Bai ◽  
Sheng-Chao Jiang ◽  
Peiwen Cong ◽  
Dezhi Ning ◽  
...  
Keyword(s):  
Immersed Boundary Method ◽  
Three Dimensional ◽  
Immersed Boundary ◽  
Water Impact ◽  
Boundary Method ◽  
Impact Problems

FPGA Implementation of Neurocomputational Models: Comparison Between Standard Back-Propagation and C-Mantec Constructive Algorithm

2017 ◽  
Vol 46 (3) ◽  
pp. 899-914 ◽  
Author(s):  
Francisco Ortega-Zamorano ◽  
José M. Jerez ◽  
Gustavo E. Juárez ◽  
Leonardo Franco
Keyword(s):  
Back Propagation ◽  
Fpga Implementation ◽  
Constructive Algorithm ◽  
Models Comparison

scholarly journals Evaluation of the atmospheric transport in a GCM using radon measurements: sensitivity to cumulus convection parameterization

2008 ◽  
Vol 8 (10) ◽  
pp. 2811-2832 ◽  
Author(s):  
K. Zhang ◽  
H. Wan ◽  
M. Zhang ◽  
B. Wang
Keyword(s):  
Vertical Distribution ◽  
Radon Concentration ◽  
Large Scale ◽  
Atmospheric Transport ◽  
Surface Concentration ◽  
Transport Processes ◽  
Cumulus Convection ◽  
Models Comparison ◽  
Convection Schemes ◽  
Convection Parameterization

Abstract. The radioactive species radon (222Rn) has long been used as a test tracer for the numerical simulation of large scale transport processes. In this study, radon transport experiments are carried out using an atmospheric GCM with a finite-difference dynamical core, the van Leer type FFSL advection algorithm, and two state-of-the-art cumulus convection parameterization schemes. Measurements of surface concentration and vertical distribution of radon collected from the literature are used as references in model evaluation. The simulated radon concentrations using both convection schemes turn out to be consistent with earlier studies with many other models. Comparison with measurements indicates that at the locations where significant seasonal variations are observed in reality, the model can reproduce both the monthly mean surface radon concentration and the annual cycle quite well. At those sites where the seasonal variation is not large, the model is able to give a correct magnitude of the annual mean. In East Asia, where radon simulations are rarely reported in the literature, detailed analysis shows that our results compare reasonably well with the observations. The most evident changes caused by the use of a different convection scheme are found in the vertical distribution of the tracer. The scheme associated with weaker upward transport gives higher radon concentration up to about 6 km above the surface, and lower values in higher altitudes. In the lower part of the atmosphere results from this scheme does not agree as well with the measurements as the other scheme. Differences from 6 km to the model top are even larger, although we are not yet able to tell which simulation is better due to the lack of observations at such high altitudes.

scholarly journals Nanofiltration of Mine Water: Impact of Feed pH and Membrane Charge on Resource Recovery and Water Discharge

Membranes ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 163-180 ◽  
Author(s):  
Mark Mullett ◽  
Roberta Fornarelli ◽  
David Ralph
Keyword(s):  
Mine Water ◽  
Water Discharge ◽  
Resource Recovery ◽  
Water Impact ◽  
Membrane Charge
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