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13 条记录 (耗时 0.021 秒)

    TEMPERATURE COUPLING ALGORITHM FOR HYBRID THERMAL LATTICE BOLTZMANN METHOD
    1.
    发明申请
    TEMPERATURE COUPLING ALGORITHM FOR HYBRID THERMAL LATTICE BOLTZMANN METHOD 审中-公开
    用于混合热分布波尔曼方法的温度耦合算法

    公开(公告)号：US20160188768A1

    公开(公告)日：2016-06-30

    申请号：US14909055

    申请日：2014-07-31

    申请人： EXA CORPORATION

    发明人： Pradeep Gopalakrishnan ,  Raoyang Zhang ,  Hudong Chen

    IPC分类号： G06F17/50 ,  G06F17/10

    摘要： A method includes simulating, in a lattice velocity set, transport of particles in a volume of fluid, with the transport causing collision among the particles; and generating a distribution function for transport of the particles, wherein the distribution function comprises a thermodynamic step and a particle collision step, and wherein the thermodynamic step is substantially independent of and separate from the particle collision step.

    摘要翻译： 一种方法包括在晶格速度集中模拟颗粒在一定体积流体中的传输，导致颗粒之间的碰撞; 以及产生用于颗粒运输的分布函数，其中所述分布函数包括热力学步骤和颗粒碰撞步骤，并且其中所述热力学步骤基本上与颗粒碰撞步骤无关并与颗粒碰撞步骤分离。

    ACOUSTIC EFFECTS OF A MESH ON A FLUID FLOW
    4.
    发明申请
    ACOUSTIC EFFECTS OF A MESH ON A FLUID FLOW 审中-公开

    公开(公告)号：US20190108296A1

    公开(公告)日：2019-04-11

    申请号：US15729216

    申请日：2017-10-10

    申请人： Exa Corporation

    发明人： Adrien Mann ,  Chenghai Sun ,  Hudong Chen ,  Raoyang Zhang ,  Franck Léon Pérot

    IPC分类号： G06F17/50

    摘要： The description describes one or more processing devices and one or more hardware storage devices storing instructions that are operable, when executed by the one or more processing devices, to cause the one or more processing devices to perform operations including modeling the porous material as a two-dimensional interface, in a simulation space, in which fluid flows and sound waves travel through the porous material and experience pressure and acoustic losses. The operations also include simulating, in the simulation space, fluid flow and propagation of sound waves, the activity of the fluid being simulated so as to simulate movement of elements within the simulation space and across the interface, where the simulation of the movement of the elements across the interface is governed by the model.

    Lattice Boltzmann Collision Operators Enforcing Isotropy and Galilean Invariance
    5.
    发明申请
    Lattice Boltzmann Collision Operators Enforcing Isotropy and Galilean Invariance 审中-公开

    公开(公告)号：US20170124232A1

    公开(公告)日：2017-05-04

    申请号：US15402732

    申请日：2017-01-10

    申请人： Exa Corporation

    发明人： Hudong Chen ,  Raoyang Zhang ,  Pradeep Gopalakrishnan

    IPC分类号： G06F17/50 ,  G06F17/18 ,  G06F17/11

    CPC分类号： G06F17/5018 ,  G06F17/11 ,  G06F17/18 ,  G06F17/5009 ,  G06F2217/16

    摘要： A method comprising: simulating, in a lattice velocity set, movement of particles in a volume of fluid, with the movement causing collision among the particles; based on the simulated movement, determining relative particle velocity of a particle at a particular location within the volume, with the relative particle velocity being a difference between (i) an absolute velocity of the particle at the particular location within the volume and measured under zero flow of the volume, and (ii) a mean velocity of one or more of the particles at the particular location within the volume; and determining, based on the relative particle velocity, a non-equilibrium post-collide distribution function of a specified order that is representative of the collision.

    Computer simulation of physical processes including modeling of laminar-to-turbulent transition
    7.
    发明授权
    Computer simulation of physical processes including modeling of laminar-to-turbulent transition 有权
    物理过程的计算机模拟，包括层流到湍流过渡的建模

    公开(公告)号：US09542506B2

    公开(公告)日：2017-01-10

    申请号：US13675329

    申请日：2012-11-13

    申请人： Exa Corporation

    发明人： Hudong Chen ,  Rupesh Kotapati ,  Raoyang Zhang ,  Richard Shock ,  Ilya Staroselsky ,  Yanbing Li

    IPC分类号： G06G7/50 ,  G06F17/50

    CPC分类号： G06F17/5018 ,  G06F17/11 ,  G06F17/5009 ,  G06F2217/16

    摘要： A method for simulating a fluid flow that includes a laminar to turbulent boundary layer transition on a computer, the method comprising: for one or more locations on or near a boundary surface: performing a first calculation where a local boundary layer is taken to be a laminar boundary layer; performing a second calculation where the local boundary layer is taken to be a turbulent boundary layer; comparing a result from the first calculation to a result from the second calculation; and based on the comparing, selecting the result of the first calculation or the result of the second calculation; and inputting the selected result for the one or more locations into a simulation of activity of a fluid in a volume comprising the boundary surface.

    摘要翻译： 一种用于模拟包括计算机上的湍流边界层过渡的层流的流体流的方法，所述方法包括：对于边界表面上或附近的一个或多个位置进行第一计算，其中局部边界层被认为是 层流边界层; 执行第二计算，其中局部边界层被认为是湍流边界层; 将来自第一计算的结果与来自第二计算的结果进行比较; 并且基于比较，选择第一次计算的结果或第二次计算的结果; 以及将所述一个或多个位置的所选择的结果输入到包括所述边界表面的体积中的流体的活动的模拟。

    Computer Simulation of Fluid Flow and Acoustic Behavior
    8.
    发明申请
    Computer Simulation of Fluid Flow and Acoustic Behavior 有权
    流体流动和声学行为的计算机模拟

    公开(公告)号：US20150242553A1

    公开(公告)日：2015-08-27

    申请号：US14710282

    申请日：2015-05-12

    申请人： Exa Corporation

    发明人： Chenghai Sun ,  Franck Léon Pérot ,  Raoyang Zhang ,  Hudong Chen ,  David M. Freed ,  Ilya Staroselsky

    IPC分类号： G06F17/50 ,  G06F17/10

    CPC分类号： G06F17/5009 ,  G06F17/10 ,  G06F17/5018 ,  G06F17/5095 ,  G06F2217/16 ,  G06F2217/82

    摘要： A computer-implemented method for simulating flow and acoustic interaction of a fluid with a porous medium includes simulating activity of a fluid in a first volume adjoining a second volume occupied by a porous medium, the activity of the fluid in the first volume being simulated so as to model movement of elements within the first volume and using a first model having a first set of parameters, simulating activity of the fluid in the second volume occupied by the porous medium, the activity in the second volume being simulated so as to model movement of elements within the second volume and using a second model having a second set of parameters and differing from the first model in a way that accounts for flow and acoustic properties of the porous medium, and simulating movement of elements between the first volume and the second volume at an interface between the first volume and the second volume.

    摘要翻译： 用于模拟流体与多孔介质的流动和声学相互作用的计算机实现的方法包括模拟邻近由多孔介质占据的第二体积的第一体积中的流体的活性，第一体积中的流体的活性被模拟 为了模拟第一体积内的元件的运动并且使用具有第一组参数的第一模型，模拟多孔介质占据的第二体积中的流体的活动，模拟第二体积中的活动以模拟运动 并且使用具有第二组参数并且以考虑多孔介质的流动和声学特性的方式与第一模型不同的第二模型，以及模拟元件在第一体积和第二体积之间的运动 在第一卷和第二卷之间的界面处的卷。