Results 151 to 160 of about 3,519,058 (177)

Numerical simulation of rotor-airframe aerodynamic interaction based on unstructured dynamic overset grids

Science China Technological Sciences, 2012
A method of unstructured dynamic overset grids is developed for the numerical simulation of helicopter unsteady rotor-airframe aerodynamic interaction. For the effective treatment of the relative motion between the rotor and the airframe, the domain of flowfield is divided into two overset subzones, namely, a rotational subzone containing the blades ...
HeYong Xu, ZhengYin Ye
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Turn and zigzag maneuvers of a surface combatant using a URANS approach with dynamic overset grids

Journal of Marine Science and Technology, 2012
Unsteady Reynolds averaged Navier–Stokes (URANS) computations of standard maneuvers are performed for a surface combatant at model and full scale. The computations are performed using CFDShip-Iowa v4, a free surface solver designed for 6DOF motions in free and semi-captive problems.
Pablo M. Carrica, Farzad Ismail, Mark Hyman, Shanti Bhushan, Frederick Stern   +4 more
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Parallel Implementation of a Dynamic Overset Unstructured Grid Approach

2006
The purpose of this study is to develop an efficient parallel computational algorithm for complex geometries using overset unstructured grid technique. The strategy adopted in the parallelization of the overset grids method including the use of hierarchical data structure and communication, is described.
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Self-propulsion computations using a speed controller and a discretized propeller with dynamic overset grids

Journal of Marine Science and Technology, 2010
A method that can be used to perform self-propulsion computations of surface ships is presented. The propeller is gridded as an overset object with a rotational velocity that is imposed by a speed controller, which finds the self-propulsion point when the ship reaches the target Froude number in a single transient computation. Dynamic overset grids are
Pablo M. Carrica, Alejandro M. Castro, Frederick Stern   +2 more
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Semi‐coupled air/water immersed boundary approach for curvilinear dynamic overset grids with application to ship hydrodynamics

International Journal for Numerical Methods in Fluids, 2008
AbstractFor many problems in ship hydrodynamics, the effects of air flow on the water flow are negligible (the frequently called free surface conditions), but the air flow around the ship is still of interest. A method is presented where the water flow is decoupled from the air solution, but the air flow uses the unsteady water flow as a boundary ...
Huang, Juntao, Carrica, Pablo M., Stern, Frederick   +2 more
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An overset grid method for integration of fully 3D fluid dynamics and geophysics fluid dynamics models to simulate multiphysics coastal ocean flows

Journal of Computational Physics, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
H. S. Tang, Ke Qu, X. G. Wu
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NUMERICAL SIMULATION OF UNSTEADY FLOW FIELD AROUND HELICOPTER IN FORWARD FLIGHT USING A PARALLEL DYNAMIC OVERSET UNSTRUCTURED GRIDS METHOD

Modern Physics Letters B, 2009
A parallel Navier-Stokes solver based on dynamic overset unstructured grids method is presented to simulate the unsteady turbulent flow field around helicopter in forward flight. The grid method has the advantages of unstructured grid and Chimera grid and is suitable to deal with multiple bodies in relatively moving.
SHULING TIAN, YIZHAO WU, JIAN XIA
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Aerodynamic Interference Effect of Huge Wind Turbine Blades With Periodic Surge Motions Using Overset Grid-Based Computational Fluid Dynamics Approach

Journal of Solar Energy Engineering, 2015
The accurate prediction of unsteady aerodynamic performance and loads, for floating offshore wind turbines (FOWTs), is still questionable because several conventional methods widely used for this purpose are applied in ways that violate the theoretical assumptions of their original formulation. The major objective of the present study is to investigate
Thanh Toan Tran, Dong-Hyun Kim, Ba Hieu Nguyen   +2 more
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Prediction of Local and Integral Self-Propulsion Flow Characteristics Using Dynamic Overset Grid Method

2022
Propulsion characteristics obtained from the model-scale experiments can be extrapolated to full-scale to be used in ship design. Due to different Reynolds (Re) numbers in model and full- scale, it is questionable if propulsion characteristics obtained with extrapolation procedure are adequate to be used in full-scale. Computational Fluid Dynamics (CFD)
Đurasević, Sanijo, Gatin, Inno, Jasak, Hrvoje   +2 more
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Advancements in Elliptic Mesh Redistribution and Automated Overset Grid Generation for Computational Fluid Dynamics

Automated and robust structured curvilinear overset grid generation remains a significant challenge for the application of computational fluid dynamics. This thesis intro- duces a specialized anisotropic Mach cone aligned adaptation algorithm for low-boom simulations and an automated procedure for generating structured curvilinear overset grids for ...
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