Adaptive Grid Refinement for Hydrodynamic Flow Simulation

Wackers, Jeroen; Ali, Zaib; Queutey, P.; Visonneau, Michel

doi:10.1179/str.2009.56.4.002

Cited by 5 publications

(11 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One possible option is to have a smooth in time and still accurate interpolation of the neighbouring cells independent of the mesh. This has already been implemented for the computation of the first and second order derivatives of the pressure for adaptive grid refinement [17], on the basis of third-order least-squares approximations.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Coupled Sliding Grids and Adaptive Grid Refinement for RANS Simulation of an Oscillating Car Model

Guilmineau

Queutey

Leroyer

et al. 2012

Volume 1: Symposia, Parts a and B

Self Cite

View full text Add to dashboard Cite

Ground vehicles travelling on the road are often subjected to unsteady flows. The yaw angle increases with stronger wind conditions such as gusty cross winds caused by unsteady atmospheric conditions, tunnels, bridges or trucks passing. Separations appear on the leeward side of the body, interact with the base flow and cause unsteady vehicle loading. These aerodynamic elements, added to dynamic properties of the suspension, springing and tires are finally the factors of its dynamic stability and of the safe manoeuvrability appreciated by the driver. With an unsteady separation, it is difficult to have a mesh adapted to the flow. For improved accuracy, automatic adaptive grid refinement is a technique for optimising the grid in the simulation of fluid flow, by adapting the grid to the flow. This is done by locally dividing cells into smaller cells, or if necessary, by merging small cells backs into larger cells in order to undo earlier refinement. The present work aims to explore the flow physics in which the vehicle is exposed to steady wind, but with continuous changes in the yaw angle. For this purpose, the unsteady numerical technique with a sliding grid approach is used in the flow solver ISIS-CFD, developed by the Laboratory of research in Hydrodynamics, Energetics, and Atmospheric Environment, ex-Fluids Mechanics Laboratory of the Ecole Centrale de Nantes. The CFD simulation is carried out with the Explicit Algebraic Reynolds Stress Model (EARSM) turbulence model. The numerical simulations are performed on the square-back Willy model. The Reynolds number is Re = 900,000 and the yaw motion of the model is close to a sinusoidal motion with an amplitude of oscillation Δβ = 10° and a frequency f = 2Hz. The numerical solution is compared with numerical results obtained in static positions. The pressure on the model is also compared with experimental data.

show abstract

Section: Resultsmentioning

confidence: 99%

“…In this paper, only the refinement criterion based on Hessian matrices is introduced. Other criteria, see [16], are available in the ISIS-CFD flow solver and used for hydrodynamic problems [17].…”

Section: Tensor Refinement Criteriamentioning

confidence: 99%

Coupled Sliding Grids and Adaptive Grid Refinement for RANS Simulation of an Oscillating Car Model

Guilmineau

Queutey

Leroyer

et al. 2012

Volume 1: Symposia, Parts a and B

Self Cite

View full text Add to dashboard Cite

show abstract

“…Free-surface flow is simulated with a multi-phase flow approach: the water surface is captured with a conservation equation for the volume fraction of water, discretized with specific compressive discretization schemes [9]. Finally, a parallelized anisotropic automatic grid refinement procedure has been developed which is controlled by various flow-related criteria [10].…”

Section: Cfd: the Isis-cfd Flow Solvermentioning

confidence: 99%

Assessment of Statistical and Hybrid LES Turbulence Closures for Surface Combatant DTMB5415 at 20° Static Drift Condition

Visonneau

Guilmineau

Wackers

et al. 2015

Volume 11: Prof. Robert F. Beck Honoring Symposium on Marine Hydrodynamics

Self Cite

View full text Add to dashboard Cite

This paper provides detailed validation of the complex free-surface flow around the surface combatant DTMB5415 at 20° static drift conditions. Particular emphasis is being placed on the onset and progression of the various vortical structures created at the sonar dome, at the free-surface and around bilge keels in conditions where free-surface breaking may occur. A detailed analysis of this complex free-surface flow is conducted on grids which are dynamically refined to capture the vortical structures. Local comparisons with recent experiments performed at the Iowa Institute of Hydraulic Research (IIHR) during a joint NATO-AVT (Advanced Vehicle Technologies) collaboration are used to perform detailed flow analysis and draw some conclusions about the actual potentialities of advanced Computation Fluid Dynamics (CFD) method in terms of physical and numerical modeling.

show abstract

“…Free-surface water flows have many features which are local in nature, so their precision can be increased with adaptive grid refinement. First, refinement around the surface strongly increases the resolution of the volume fraction equation [9,8,27,28], so the modeling of the free surface is improved. But also other aspects of these flows, such as wakes and trailing vortices, are resolved with greater precision when grid refinement is used [10,24,29].…”

Section: Introductionmentioning

confidence: 99%

“…Instead, the original grid was chosen sufficiently fine to get a reasonable resolution of the flow, then automatic grid refinement was used to to improve the accuracy of one particular flow feature. Thus, gravity waves at the water surface were computed with refinement based on the discontinuity in the volume fraction [28] and wake flows with refinement based on the pressure [24,25].…”

Section: Introductionmentioning

confidence: 99%

Combined refinement criteria for anisotropic grid refinement in free-surface flow simulation

Wackers¹,

Deng²,

Guilmineau³

et al. 2014

Computers & Fluids

Self Cite

View full text Add to dashboard Cite

show abstract

Adaptive Grid Refinement for Hydrodynamic Flow Simulation

Cited by 5 publications

References 3 publications

Coupled Sliding Grids and Adaptive Grid Refinement for RANS Simulation of an Oscillating Car Model

Coupled Sliding Grids and Adaptive Grid Refinement for RANS Simulation of an Oscillating Car Model

Assessment of Statistical and Hybrid LES Turbulence Closures for Surface Combatant DTMB5415 at 20° Static Drift Condition

Combined refinement criteria for anisotropic grid refinement in free-surface flow simulation

Contact Info

Product

Resources

About