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1. 发明申请

US20070239414A1 Method of simulating detailed movements of fluids using derivative particles 有权
标题翻译：使用衍生颗粒模拟流体的详细运动的方法
公开(公告)号：US20070239414A1
公开(公告)日：2007-10-11
申请号：US11398982
申请日：2006-04-05
申请人： Oh-Young Song , Doyub Kim , Hyeong-Seok Ko
发明人： Oh-Young Song , Doyub Kim , Hyeong-Seok Ko
IPC分类号： G06G7/48
CPC分类号： G06F17/5018 , G06F2217/16
摘要： The method provides a new fluid simulation technique that significantly reduces the non-physical dissipation of velocity using particles and derivative information. In solving the conventional Navier-Stokes equations, the method replace the advection part with a particle simulation. When swapping between the grid-based and particle-based simulators, the physical quantities such as the level set and velocity must be converted. A novel dissipation-suppressing conversion procedure that utilizes the derivative information stored in the particles as well as in the grid points is developed. Through several experiments, the proposed technique can reproduce the detailed movements of high-Reynolds-number fluids, such as droplets/bubbles, thin water sheets, and whirlpools. The increased accuracy in the advection, which forms the basis of the proposed technique, can also be used to produce better results in larger scale fluid simulations.
摘要翻译：该方法提供了一种新的流体模拟技术，可显着减少使用粒子和衍生信息的非物理物理耗散速度。在解决传统的Navier-Stokes方程中，该方法用粒子模拟来代替对流部分。在基于网格和基于粒子的模拟器之间进行交换时，必须转换物理量，如水平设定和速度。开发了利用存储在粒子中以及在网格点中的导数信息的新颖的耗散抑制转换过程。通过几个实验，所提出的技术可以再现高雷诺数流体的细节运动，例如液滴/气泡，薄水层和旋涡。形成所提出技术基础的对流增加精度也可用于在较大规模的流体模拟中产生更好的结果。

2. 发明授权

US08386224B2 Method for simulating stretching and wiggling liquids 有权
标题翻译：模拟拉伸和摆动液体的方法
公开(公告)号：US08386224B2
公开(公告)日：2013-02-26
申请号：US12614295
申请日：2009-11-06
申请人： Doyub Kim , Oh-Young Song , Hyeong-Seok Ko
发明人： Doyub Kim , Oh-Young Song , Hyeong-Seok Ko
IPC分类号： G06G7/50
CPC分类号： G06F17/5018 , G06F2217/16 , G06F2217/42
摘要： A method for simulating the stretching and wiggling of liquids is provided. The complex phase-interface dynamics is effectively simulated by introducing the Eulerian vortex sheet method, which focuses on the vorticity at the interface and is extended to provide user control for the production of visual effects. The generated fluid flow creates complex surface details, such as thin and wiggling fluid sheets. To capture such high-frequency features efficiently, a denser grid is used for surface tracking in addition to coarser simulation grid. A filter, called the liquid-biased filter, is used to downsample the surface in the high-resolution grid into the coarse grid without unrealistic volume loss resulting from aliasing error.
摘要翻译：提供了一种用于模拟液体的拉伸和摆动的方法。通过引入欧拉涡流片方法有效地模拟了复相相界面动力学，该方法侧重于界面的涡度，并被扩展为用户控制视觉效果的产生。产生的流体流动产生复杂的表面细节，例如薄的和扭曲的流体片。为了有效地捕获这种高频特征，除了较粗糙的模拟网格之外，还使用更密集的网格进行表面跟踪。称为液体偏置滤波器的滤波器用于将高分辨率网格中的表面向下采样到粗网格中，而不会产生由混叠误差导致的不切实际的体积损失。

3. 发明授权

US07565276B2 Method of simulating detailed movements of fluids using derivative particles 有权
标题翻译：使用衍生颗粒模拟流体的详细运动的方法
公开(公告)号：US07565276B2
公开(公告)日：2009-07-21
申请号：US11398982
申请日：2006-04-05
申请人： Oh-Young Song , Doyub Kim , Hyeong-Seok Ko
发明人： Oh-Young Song , Doyub Kim , Hyeong-Seok Ko
IPC分类号： G06F17/50 , G06T13/00
CPC分类号： G06F17/5018 , G06F2217/16
摘要： The method provides a new fluid simulation technique that significantly reduces the non-physical dissipation of velocity using particles and derivative information. In solving the conventional Navier-Stokes equations, the method replace the advection part with a particle simulation. When swapping between the grid-based and particle-based simulators, the physical quantities such as the level set and velocity must be converted. A novel dissipation-suppressing conversion procedure that utilizes the derivative information stored in the particles as well as in the grid points is developed. Through several experiments, the proposed technique can reproduce the detailed movements of high-Reynolds-number fluids, such as droplets/bubbles, thin water sheets, and whirlpools. The increased accuracy in the advection, which forms the basis of the proposed technique, can also be used to produce better results in larger scale fluid simulations.
摘要翻译：该方法提供了一种新的流体模拟技术，可显着减少使用粒子和衍生信息的非物理物理耗散速度。在解决传统的Navier-Stokes方程中，该方法用粒子模拟来代替对流部分。在基于网格和基于粒子的模拟器之间进行交换时，必须转换物理量，如水平设定和速度。开发了利用存储在粒子中以及在网格点中的导数信息的新颖的耗散抑制转换过程。通过几个实验，所提出的技术可以再现高雷诺数流体的细节运动，例如液滴/气泡，薄水层和旋涡。形成所提出技术基础的对流增加精度也可用于在较大规模的流体模拟中产生更好的结果。

4. 发明授权

US08577659B2 Method for simulating dispersed bubble flow 有权
标题翻译：模拟分散气泡流动的方法
公开(公告)号：US08577659B2
公开(公告)日：2013-11-05
申请号：US12870540
申请日：2010-08-27
申请人： Doyub Kim , Oh-Young Song , Hyeong-Seok Ko
发明人： Doyub Kim , Oh-Young Song , Hyeong-Seok Ko
IPC分类号： G06G7/48 , G06G7/50
CPC分类号： G06F17/5009 , G06F2217/16
摘要： A simple and efficient method for simulating dispersed bubble flow is provided. Instead of modeling the complex hydrodynamics of numerous small bubbles explicitly, the method approximates the average motion of these bubbles using a continuum multiphase solver. The subgrid interactions among bubbles are computed using a new stochastic solver. Using the proposed scheme, complex scenes with millions of bubbles can be simulated efficiently.
摘要翻译：提供了一种简单有效的模拟分散气泡流的方法。该方法不是明确地模拟许多小气泡的复杂流体动力学，而是使用连续多相解算器来近似这些气泡的平均运动。使用新的随机求解器计算气泡之间的亚格子相互作用。使用提出的方案，可以有效地模拟具有数百万个气泡的复杂场景。

5. 发明申请

US20120053908A1 Method for simulating dispersed bubble flow 有权
标题翻译：模拟分散气泡流动的方法
公开(公告)号：US20120053908A1
公开(公告)日：2012-03-01
申请号：US12870540
申请日：2010-08-27
申请人： Doyub KIM , Oh-Young Song , Hyeong-Seok Ko
发明人： Doyub KIM , Oh-Young Song , Hyeong-Seok Ko
IPC分类号： G06F17/10 , G06F7/60
CPC分类号： G06F17/5009 , G06F2217/16
摘要： A simple and efficient method for simulating dispersed bubble flow is provided. Instead of modeling the complex hydrodynamics of numerous small bubbles explicitly, the method approximates the average motion of these bubbles using a continuum multiphase solver. The subgrid interactions among bubbles are computed using a new stochastic solver. Using the proposed scheme, complex scenes with millions of bubbles can be simulated efficiently.
摘要翻译：提供了一种简单有效的模拟分散气泡流的方法。该方法不是明确地模拟许多小气泡的复杂流体动力学，而是使用连续多相解算器近似这些气泡的平均运动。使用新的随机求解器计算气泡之间的亚格子相互作用。使用提出的方案，可以有效地模拟具有数百万个气泡的复杂场景。

6. 发明授权

US08055490B2 Semi-Lagrangian CIP fluid solver without dimensional splitting 有权
标题翻译：半拉格朗日CIP流体求解器无尺寸分裂
公开(公告)号：US08055490B2
公开(公告)日：2011-11-08
申请号：US12414978
申请日：2009-03-31
申请人： Doyub Kim , Oh-Young Song , Hyeong-Seok Ko
发明人： Doyub Kim , Oh-Young Song , Hyeong-Seok Ko
IPC分类号： G06G7/50
CPC分类号： G06F17/5018 , G06F2217/16
摘要： A new constrained interpolation profile method, which is stable and accurate but requires less amount of computation, is provided. CIP is a high-order fluid advection solver that can reproduce rich details of fluids. It has third-order accuracy but its computation is performed over a compact stencil. A novel modification of the original CIP method that fixes all of the above problems without increasing the computational load or reducing the accuracy is provided. The proposed method brings significant improvements in both accuracy and speed.
摘要翻译：提供了一种稳定准确但需要较少计算量的新型约束插值分析方法。 CIP是一种高阶流体平流解算器，可以再现丰富的流体细节。它具有三阶精度，但其计算是通过紧凑型模板执行的。提供了在不增加计算负载或降低精度的情况下修复所有上述问题的原始CIP方法的新颖的修改。所提出的方法在精度和速度方面都有显着的改进。

7. 发明申请

US20110112800A1 Method for Simulating Stretching and Wiggling Liquids 有权
标题翻译：模拟拉伸和摇摆液体的方法
公开(公告)号：US20110112800A1
公开(公告)日：2011-05-12
申请号：US12614295
申请日：2009-11-06
申请人： Doyub KIM , Oh-Young Song , Hyeong-Seok Ko
发明人： Doyub KIM , Oh-Young Song , Hyeong-Seok Ko
IPC分类号： G06G7/57 , G06F17/10 , G06F17/11
CPC分类号： G06F17/5018 , G06F2217/16 , G06F2217/42
摘要： A method for simulating the stretching and wiggling of liquids is provided. The complex phase-interface dynamics is effectively simulated by introducing the Eulerian vortex sheet method, which focuses on the vorticity at the interface and is extended to provide user control for the production of visual effects. The generated fluid flow creates complex surface details, such as thin and wiggling fluid sheets. To capture such high-frequency features efficiently, a denser grid is used for surface tracking in addition to coarser simulation grid. A filter, called the liquid-biased filter, is used to downsample the surface in the high-resolution grid into the coarse grid without unrealistic volume loss resulting from aliasing error.
摘要翻译：提供了一种用于模拟液体的拉伸和摆动的方法。通过引入欧拉涡流片方法有效地模拟了复相相界面动力学，该方法侧重于界面的涡度，并被扩展为用户控制视觉效果的产生。产生的流体流动产生复杂的表面细节，例如薄的和扭曲的流体片。为了有效地捕获这种高频特征，除了较粗糙的模拟网格之外，还使用更密集的网格进行表面跟踪。称为液体偏置滤波器的滤波器用于将高分辨率网格中的表面向下采样到粗网格中，而不会产生由混叠误差导致的不切实际的体积损失。

8. 发明授权

US07647214B2 Method for simulating stable but non-dissipative water 失效
标题翻译：用于模拟稳定但不耗散水的方法
公开(公告)号：US07647214B2
公开(公告)日：2010-01-12
申请号：US11318171
申请日：2005-12-23
申请人： Oh-Young Song , Hyuncheol Shin , Hyeong-Seok Ko
发明人： Oh-Young Song , Hyuncheol Shin , Hyeong-Seok Ko
IPC分类号： G06F17/50 , B41J3/28
CPC分类号： G06F17/5018 , G06F2217/16 , G06T13/60 , G06T2210/24
摘要： A method for graphically simulating stable but non-dissipative water in real-time includes steps for modeling multiphase materials with grid of nodes, suppressing numerical dissipation for getting rid of loss of mass of material, and suppressing numerical diffusion for reducing dampening of the fluid motion of materials in liquid phase. The step of modeling multiphase materials includes steps of describing liquid and gas with a set of nonlinear partial differential equations, representing the liquid-gas interface as an implicit surface, and determining properties of the materials, from the information about the liquid-gas interface, including the surface curvature and the surface tension. The set of nonlinear partial differential equations includes multiphase incompressible Navier-Stokes equations. The step of representing the liquid-gas interface includes a level set method.
摘要翻译：一种用于图形化地模拟稳定的非耗散水的方法包括：对具有节点网格的多相材料进行建模的步骤，抑制数值耗散以消除材料质量的损失，以及抑制数值扩散以减少流体运动的衰减的液相材料。建模多相材料的步骤包括使用一组非线性偏微分方程来描述液体和气体的步骤，将液体 - 气体界面表示为隐含表面，并根据关于液 - 气界面的信息确定材料的性质，包括表面曲率和表面张力。该组非线性偏微分方程包括多相不可压缩Navier-Stokes方程。表示液 - 气界面的步骤包括液位设定方法。

9. 发明申请

US20070043544A1 Method for simulating stable but non-dissipative water 失效
标题翻译：用于模拟稳定但不耗散水的方法
公开(公告)号：US20070043544A1
公开(公告)日：2007-02-22
申请号：US11318171
申请日：2005-12-23
申请人： Oh-Young Song , Hyuncheol Shin , Hyeong-Seok Ko
发明人： Oh-Young Song , Hyuncheol Shin , Hyeong-Seok Ko
IPC分类号： G06G7/48
CPC分类号： G06F17/5018 , G06F2217/16 , G06T13/60 , G06T2210/24
摘要： A method for graphically simulating stable but non-dissipative water in real-time includes steps for modeling multiphase materials with grid of nodes, suppressing numerical dissipation for getting rid of loss of mass of material, and suppressing numerical diffusion for reducing dampening of the fluid motion of materials in liquid phase. The step of modeling multiphase materials includes steps of describing liquid and gas with a set of nonlinear partial differential equations, representing the liquid-gas interface as an implicit surface, and determining properties of the materials, from the information about the liquid-gas interface, including the surface curvature and the surface tension. The set of nonlinear partial differential equations includes multiphase incompressible Navier-Stokes equations. The step of representing the liquid-gas interface includes a level set method.
摘要翻译：一种用于图形化地模拟稳定的非耗散水的方法包括：对具有节点网格的多相材料进行建模的步骤，抑制数值耗散以消除材料质量的损失，以及抑制数值扩散以减少流体运动的衰减的液相材料。建模多相材料的步骤包括使用一组非线性偏微分方程来描述液体和气体的步骤，将液体 - 气体界面表示为隐含表面，并根据关于液 - 气界面的信息确定材料的性质，包括表面曲率和表面张力。该组非线性偏微分方程包括多相不可压缩Navier-Stokes方程。表示液 - 气界面的步骤包括液位设定方法。

10. 发明申请

US20070118343A1 Immediate buckling model, hysteresis model, and cloth simulation method based on the invented models, and computer-readable media storing a program which executes the invented simulation method 有权
标题翻译：基于本发明的模型的立即屈曲模型，滞后模型和布模拟方法，以及存储执行本发明模拟方法的程序的计算机可读介质
公开(公告)号：US20070118343A1
公开(公告)日：2007-05-24
申请号：US11652768
申请日：2007-01-12
申请人： Hyeong-Seok Ko , Kwang-Jin Choi
发明人： Hyeong-Seok Ko , Kwang-Jin Choi
IPC分类号： G06F17/10
CPC分类号： G06T13/20 , G06F17/5009 , G06F2217/32 , G06T17/00 , G06T2210/16
摘要： A method of simulating the movement of cloth and a computer-readable medium storing a program which executes the method of simulating the movement of cloth, wherein cloth deformation by compressive force is simulated by an immediate buckling model when the compressive force is applied to two extremities of a deformation unit which models the cloth, cloth deformation by stretching is simulated by a spring model, and hysteresis phenomenon of cloth is simulated by using spring-slips for modeling. The immediate buckling model is based on a model of the present invention in which a deformation unit is not contracted by compressive force and generates an immediate bending deformation. As for the compressive force and stretching, simulation is implemented by separate models, hysteresis phenomenon of cloth is simulated by use of spring-clips for modeling, whereby cloth characteristics can be well reflected and the buckling instability of cloth caused by compressive force can be solved, thereby increasing the simulation speed.
摘要翻译：一种模拟布料移动的方法和一种存储程序的计算机可读介质，该程序执行模拟布料运动的方法，其中当压缩力施加到两个末端时，通过压缩力进行的布变形通过立即屈曲模型来模拟通过弹簧模型模拟布料对织物进行建模的变形单元，通过拉伸模拟布料变形，并通过弹簧模拟模拟布料的滞后现象。立即屈曲模型基于本发明的模型，其中变形单元不被压缩力收缩并且产生立即的弯曲变形。对于压缩力和拉伸，通过单独的模型实现模拟，通过使用用于建模的弹簧夹来模拟布的滞后现象，从而可以很好地反映布特性，并且可以解决由压缩力引起的布的翘曲不稳定性，从而提高模拟速度。

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