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An efficient semi-implicit subgrid method for free-surface flows on hierarchical grids. / Platzek, FW; Stelling, GS; Jankowski, JA; Patzwahl, R; Pietrzak, JD.

In: International Journal for Numerical Methods in Fluids, Vol. 80, No. 12, 2016, p. 715-741.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Platzek, FW, Stelling, GS, Jankowski, JA, Patzwahl, R & Pietrzak, JD 2016, 'An efficient semi-implicit subgrid method for free-surface flows on hierarchical grids', International Journal for Numerical Methods in Fluids, vol. 80, no. 12, pp. 715-741. https://doi.org/10.1002/fld.4172

APA

Platzek, FW., Stelling, GS., Jankowski, JA., Patzwahl, R., & Pietrzak, JD. (2016). An efficient semi-implicit subgrid method for free-surface flows on hierarchical grids. International Journal for Numerical Methods in Fluids, 80(12), 715-741. https://doi.org/10.1002/fld.4172

Vancouver

Platzek FW, Stelling GS, Jankowski JA, Patzwahl R, Pietrzak JD. An efficient semi-implicit subgrid method for free-surface flows on hierarchical grids. International Journal for Numerical Methods in Fluids. 2016;80(12):715-741. https://doi.org/10.1002/fld.4172

Author

Platzek, FW ; Stelling, GS ; Jankowski, JA ; Patzwahl, R ; Pietrzak, JD. / An efficient semi-implicit subgrid method for free-surface flows on hierarchical grids. In: International Journal for Numerical Methods in Fluids. 2016 ; Vol. 80, No. 12. pp. 715-741.

BibTeX

@article{f016c8721e4c48da889db84991e5d6c3,
title = "An efficient semi-implicit subgrid method for free-surface flows on hierarchical grids",
abstract = "We present a new modelling strategy for improving the efficiency of computationally intensive flow problems in environmental free-surface flows. The approach combines a recently developed semi-implicit subgrid method with a hierarchical grid solution strategy. The method allows the incorporation of high-resolution data on subgrid scale to obtain a more accurate and efficient hydrodynamic model. The subgrid method improves the efficiency of the hierarchical grid method by providing better solutions on coarse grids. The method is applicable to both steady and unsteady flows, but we particularly focus on river flows with steady boundary conditions. There, the combined hierarchical grid-subgrid method reduces the computational effort to obtain a steady state with factors up to 43. For unsteady models, the method can be used for efficiently generating accurate initial conditions on high-resolution grids. Additionally, the method provides automatic insight in grid convergence. We demonstrate the efficiency and applicability of the method using a schematic test for the vortex shedding around a circular cylinder and a real-world river case study",
keywords = "CWTS JFIS < 0.75",
author = "FW Platzek and GS Stelling and JA Jankowski and R Patzwahl and JD Pietrzak",
year = "2016",
doi = "10.1002/fld.4172",
language = "English",
volume = "80",
pages = "715--741",
journal = "International Journal for Numerical Methods in Fluids",
issn = "0271-2091",
publisher = "John Wiley & Sons",
number = "12",

}

RIS

TY - JOUR

T1 - An efficient semi-implicit subgrid method for free-surface flows on hierarchical grids

AU - Platzek, FW

AU - Stelling, GS

AU - Jankowski, JA

AU - Patzwahl, R

AU - Pietrzak, JD

PY - 2016

Y1 - 2016

N2 - We present a new modelling strategy for improving the efficiency of computationally intensive flow problems in environmental free-surface flows. The approach combines a recently developed semi-implicit subgrid method with a hierarchical grid solution strategy. The method allows the incorporation of high-resolution data on subgrid scale to obtain a more accurate and efficient hydrodynamic model. The subgrid method improves the efficiency of the hierarchical grid method by providing better solutions on coarse grids. The method is applicable to both steady and unsteady flows, but we particularly focus on river flows with steady boundary conditions. There, the combined hierarchical grid-subgrid method reduces the computational effort to obtain a steady state with factors up to 43. For unsteady models, the method can be used for efficiently generating accurate initial conditions on high-resolution grids. Additionally, the method provides automatic insight in grid convergence. We demonstrate the efficiency and applicability of the method using a schematic test for the vortex shedding around a circular cylinder and a real-world river case study

AB - We present a new modelling strategy for improving the efficiency of computationally intensive flow problems in environmental free-surface flows. The approach combines a recently developed semi-implicit subgrid method with a hierarchical grid solution strategy. The method allows the incorporation of high-resolution data on subgrid scale to obtain a more accurate and efficient hydrodynamic model. The subgrid method improves the efficiency of the hierarchical grid method by providing better solutions on coarse grids. The method is applicable to both steady and unsteady flows, but we particularly focus on river flows with steady boundary conditions. There, the combined hierarchical grid-subgrid method reduces the computational effort to obtain a steady state with factors up to 43. For unsteady models, the method can be used for efficiently generating accurate initial conditions on high-resolution grids. Additionally, the method provides automatic insight in grid convergence. We demonstrate the efficiency and applicability of the method using a schematic test for the vortex shedding around a circular cylinder and a real-world river case study

KW - CWTS JFIS < 0.75

U2 - 10.1002/fld.4172

DO - 10.1002/fld.4172

M3 - Article

VL - 80

SP - 715

EP - 741

JO - International Journal for Numerical Methods in Fluids

JF - International Journal for Numerical Methods in Fluids

SN - 0271-2091

IS - 12

ER -

ID: 2244684