会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Thermal flow simulation for casting/molding processes
    • 铸造/成型工艺的热流模拟
    • US07024342B1
    • 2006-04-04
    • US09610390
    • 2000-07-01
    • David Marc WaiteShaupoh WangJenn-Yeu Nieh
    • David Marc WaiteShaupoh WangJenn-Yeu Nieh
    • G06G7/48
    • B29C45/7693B22D17/32G06F17/5018G06F2217/16G06F2217/41G06F2217/80
    • A numerical procedure for simulating the behavior of incompressible, viscous fluid in a casting/molding process. The method is based on classical fluid dynamic equations and uses control volume-finite element and numerical techniques to solve the momentum and energy equations to obtain solution for the variable parameters. The method incorporates five additional modules which simulate fluid flow in the shot sleeve, heat transfer between the die and the heat transfer fluid, die cooling by lubricant, formation of mend line. These additional simulation modules produce realistic boundary conditions, and replace many of the assumptions that would have to be made, to solve the governing equations. These added improvements ensure a faster convergence of the numerical solution and a more realistic simulation of the die casting process.
    • 用于模拟铸造/成型工艺中不可压缩粘性流体的行为的数值程序。 该方法基于经典流体动力学方程,并采用控制体积有限元和数值方法求解动量和能量方程,以获得可变参数的解。 该方法包括五个额外的模块,其模拟喷射套筒中的流体流动,模具和传热流体之间的热传递,通过润滑剂的模具冷却,修补线的形成。 这些额外的模拟模块产生了逼真的边界条件,并且取代了许多必须做出的假设来解决控制方程。 这些增加的改进确保了数字解决方案的更快的收敛和压铸过程的更逼真的模拟。
    • 5. 发明授权
    • Equal order method for fluid flow simulation
    • 流体流动模拟的等顺序法
    • US06611736B1
    • 2003-08-26
    • US09610641
    • 2000-07-01
    • David Marc WaiteShaupoh WangJenn-Yeu Nieh
    • David Marc WaiteShaupoh WangJenn-Yeu Nieh
    • G05D900
    • G06F17/5018G06F2217/16
    • The present invention provides a method for solving the Navier-Stokes equation of viscous, incompressible laminar flows with moving free surfaces in complex domains. The method uses fixed mesh control volume-finite element techniques to track the flow. A gauss point velocity vector is defined as the average of its nodal counterpart, such that the gauss point velocity vector is constant over the element. The gauss point velocity vector is then inserted into the continuity constraint to form the Poisson pressure equation for solving the pressure field. The solution to the Poisson pressure equation is unique, the common checker-board problem is therefore eliminated. The corrected pressure field is substituted into the momentum equations, so that the resulting velocity field satisfies the continuity equation. Since velocity and pressure are evaluated at the same order, the global mass conservation can be evaluated to machine round-off tolerances.
    • 本发明提供了一种用于解决复杂域中具有移动自由表面的粘性不可压缩层流的Navier-Stokes方程的方法。 该方法使用固定网格控制体积有限元技术来跟踪流量。 高斯点速度矢量被定义为其节点对应物的平均值,使得高斯点速度矢量在元件上是恒定的。 然后将高斯点速度矢量插入到连续性约束中,形成解压力场的泊松压力方程。 泊松压力方程的解决方案是独一无二的,因此消除了常见的棋盘问题。 将校正的压力场代入动量方程,使得所得到的速度场满足连续性方程。 由于速度和压力以相同的顺序进行评估,因此可以对全局质量守恒进行评估,以计算舍入误差。