基于高阶谱方法与CFD计算的耦合模型在不规则波模拟中的应用
|
摘要
基于高阶谱(HOS)方法的势流造波模型可进行波浪的高效率非线性演化模拟,但由于忽略了黏性影响,在研究波浪与物体相互作用中,对于波浪破碎和边界层流场细节模拟等方面很难实现,而黏性波浪水池则有计算量大的局限性。该文建立了基于高阶谱(HOS)方法与CFD计算的耦合模型,外域波浪场依靠势流模型计算,而内域波浪场演化则通过求解Navier-Stokes方程获得,通过松弛区将二者结合,可以避免求解大范围的黏性波浪场而带来的巨大计算量,并且能在波浪与物体相互作用中考虑黏性影响。在对多种波浪类型的模拟以及网格尺度影响讨论中,黏势流耦合模型的适用性得到验证。并在多向不规则波的聚焦波模拟,以及基于势流基础上的大范围长时间演化下得到的极端海浪在CFD域内重构中,黏势流耦合模型都有其成功应用。
The wave generation model for potential flow based on High-Order Spectral(HOS) method can perform high-efficiently on the fully nonlinear evolution of waves. However, without considering the viscosity effect, in the study of theinteraction between waves and objects, it is difficult to achieve the simulation of wave breaking and boundary layer flow field indetails. But the viscous wave tank has the limitation of large calculation. A coupling model based on high-order spectral(HOS)method and CFD calculation is established, with the wave fields in outer domain calculated by the potential flow model and ininner domain obtained by solving Navier-Stokes equations. And the outer and inner wave fields are connected by relaxation zones.This model avoids the huge computational effort of solving a wide range of viscous wave fields, but considers the viscosity effectin simulating the interaction of waves and structures. In the discussions of the simulation of various wave types and the influenceof grid scale, the applicability of the coupling model is verified. The coupling model also has its successful application in thereconstruction of the extreme waves in CFD domain, which are obtained from the multi-directional irregular waves evolution in thelong-term or focusing waves based on the potential model.
The wave generation model for potential flow based on High-Order Spectral(HOS) method can perform high-efficiently on the fully nonlinear evolution of waves. However, without considering the viscosity effect, in the study of theinteraction between waves and objects, it is difficult to achieve the simulation of wave breaking and boundary layer flow field indetails. But the viscous wave tank has the limitation of large calculation. A coupling model based on high-order spectral(HOS)method and CFD calculation is established, with the wave fields in outer domain calculated by the potential flow model and ininner domain obtained by solving Navier-Stokes equations. And the outer and inner wave fields are connected by relaxation zones.This model avoids the huge computational effort of solving a wide range of viscous wave fields, but considers the viscosity effectin simulating the interaction of waves and structures. In the discussions of the simulation of various wave types and the influenceof grid scale, the applicability of the coupling model is verified. The coupling model also has its successful application in thereconstruction of the extreme waves in CFD domain, which are obtained from the multi-directional irregular waves evolution in thelong-term or focusing waves based on the potential model.
引文
[1]WEST B,BRUECKNER K,JANDA R,et al.A new numerical method for surface hydrodynamics[J].Journal of Geophysical Research Oceans,1987,92:11803-11824.
[2]DOMMERMUTH D G,YUE D K P.A high-order spectral method for the study of nonlinear gravity waves[J].Journal Fluid Mechanics,1987,184:267-288.
[3]TANAKA M.Verification of Hasselmann's energy transfer among surface gravity waves by direct numerical simulations of primitive equations[J].Journal of Fluid Mechanics,2001,444:199-221.
[4]DUCROZET G,BONNEFOY F,LE TOUZéD,et al.3-D HOS simulations of extreme waves in open seas[J].Natural Hazards and Earth System Science,2007,7(1):109-122.
[5]JACOBSEN N G,FUHRMAN D R,FREDS?E J.Awave generation toolbox for the open-source CFDlibrary:OpenFoam?[J].International Journal for Numerical Methods in Fluids,2012,70(9):1073-1088.
[6]CAO H J,WAN D C.RANS-VOF solver for solitary wave run-up on a circular cylinder[J].China Ocean Engineering,2015,29(2):183-196.
[7]FERRANT P,GENTAZ L,TOUZéD L.A new RANSE/Potential approach for water wave diffraction[C].Numerical Towing Tank Symposium,Nutts.2002.
[8]MONROY C,DUCROZET G,BONNEFOY F,et al.RANS simulations of CALM buoy in regular and irregular seas using SWENSE method[J].International Journal of Offshore&Polar Engineering,2011,21(4):81-90.
[9]PAULSEN B T,BREDMOSE H,BINGHAM H B.An efficient domain decomposition strategy for wave loads on surface piercing circular cylinders[J].Coastal Engineering,2014,86:57-76.
[10]CHOI Y M,BOUSCASSE B,SENG S,et al.Generation of regular and irregular waves in Navier-Stokes CFD solvers by matching with the nonlinear potential wave solution at the boundaries[C].The ASME 201837th International Conference on Ocean,Offshore and Arctic Engineering,OMAE2018,Madrid,Spain,2018.
[11]ZHUANG Y,WAN D C,BENJAMIN B,et al,Regular and irregular wave generation in Open FOAM using high order spectral method,The 13th OpenFOAMWorkshop(OFW13),Shanghai,China,2018.
[12]DUCROZET G,BONNEFOY F,LE TOUZéD,et al.HOS-ocean:Open-source solver for nonlinear waves in open ocean based on High-Order spectral method[J].Computer Physics Communications,2016,203:245-254.
[13]DOMMERMUTH D.The initialization of nonlinear waves using an adjustment scheme[J].Wave Motion,2000,32(4):307-317.
[14]DUCROZET G,BONNEFOY F,LE TOUZéD,et al.Amodified high-order spectral method for wavemaker modeling in a numerical wave tank[J].European Journal of Mechanics-B/Fluids,2012,34:19-34.
[15]季新然,柳淑学,PAULSEN,等.基于势流理论和Open FOAM的耦合模型对多向不规则波浪的模拟[J].水科学进展,2016,27(1):88-99.JI X R,LIU S X,PAULSEN B T,et al.Numerical research on multidirectional waves progresses on the coupling model based on the potential theory an OpenFOAM[J].Advance in Water Science,2016,27(1):88-99.
[16]SONG J Q,ZHUANG Y,WAN D C,New wave spectrums models developed based on HOS method[C].The Twenty-eighth(2018)International Ocean and Polar Engineering Conference Sapporo,Japan,2018.
[2]DOMMERMUTH D G,YUE D K P.A high-order spectral method for the study of nonlinear gravity waves[J].Journal Fluid Mechanics,1987,184:267-288.
[3]TANAKA M.Verification of Hasselmann's energy transfer among surface gravity waves by direct numerical simulations of primitive equations[J].Journal of Fluid Mechanics,2001,444:199-221.
[4]DUCROZET G,BONNEFOY F,LE TOUZéD,et al.3-D HOS simulations of extreme waves in open seas[J].Natural Hazards and Earth System Science,2007,7(1):109-122.
[5]JACOBSEN N G,FUHRMAN D R,FREDS?E J.Awave generation toolbox for the open-source CFDlibrary:OpenFoam?[J].International Journal for Numerical Methods in Fluids,2012,70(9):1073-1088.
[6]CAO H J,WAN D C.RANS-VOF solver for solitary wave run-up on a circular cylinder[J].China Ocean Engineering,2015,29(2):183-196.
[7]FERRANT P,GENTAZ L,TOUZéD L.A new RANSE/Potential approach for water wave diffraction[C].Numerical Towing Tank Symposium,Nutts.2002.
[8]MONROY C,DUCROZET G,BONNEFOY F,et al.RANS simulations of CALM buoy in regular and irregular seas using SWENSE method[J].International Journal of Offshore&Polar Engineering,2011,21(4):81-90.
[9]PAULSEN B T,BREDMOSE H,BINGHAM H B.An efficient domain decomposition strategy for wave loads on surface piercing circular cylinders[J].Coastal Engineering,2014,86:57-76.
[10]CHOI Y M,BOUSCASSE B,SENG S,et al.Generation of regular and irregular waves in Navier-Stokes CFD solvers by matching with the nonlinear potential wave solution at the boundaries[C].The ASME 201837th International Conference on Ocean,Offshore and Arctic Engineering,OMAE2018,Madrid,Spain,2018.
[11]ZHUANG Y,WAN D C,BENJAMIN B,et al,Regular and irregular wave generation in Open FOAM using high order spectral method,The 13th OpenFOAMWorkshop(OFW13),Shanghai,China,2018.
[12]DUCROZET G,BONNEFOY F,LE TOUZéD,et al.HOS-ocean:Open-source solver for nonlinear waves in open ocean based on High-Order spectral method[J].Computer Physics Communications,2016,203:245-254.
[13]DOMMERMUTH D.The initialization of nonlinear waves using an adjustment scheme[J].Wave Motion,2000,32(4):307-317.
[14]DUCROZET G,BONNEFOY F,LE TOUZéD,et al.Amodified high-order spectral method for wavemaker modeling in a numerical wave tank[J].European Journal of Mechanics-B/Fluids,2012,34:19-34.
[15]季新然,柳淑学,PAULSEN,等.基于势流理论和Open FOAM的耦合模型对多向不规则波浪的模拟[J].水科学进展,2016,27(1):88-99.JI X R,LIU S X,PAULSEN B T,et al.Numerical research on multidirectional waves progresses on the coupling model based on the potential theory an OpenFOAM[J].Advance in Water Science,2016,27(1):88-99.
[16]SONG J Q,ZHUANG Y,WAN D C,New wave spectrums models developed based on HOS method[C].The Twenty-eighth(2018)International Ocean and Polar Engineering Conference Sapporo,Japan,2018.