1. <ruby id="li44o"></ruby>

      1. <rt id="li44o"><optgroup id="li44o"></optgroup></rt><cite id="li44o"><span id="li44o"></span></cite>
        三峽數學研究中心
         TGMRC  News  Directory  Research Programs  Training Programs  Research Outcomes  Alumni & Friends  How to Apply 
        當前位置: TGMRC>>News>>正文
        Julian Koellermeier: On the Hyperbolicity and Numerical Simulation of Shallow Water Moment Equations
        2019-08-27 16:39  

         

                                           Abstract

         

        The simulation of granular flows such as landslides or snow avalanches can be modeled using the shallow water equations and appropriate models for the friction terms. However, standard shallow water models assume a constant vertical velocity over the height of the water. In this talk, I will present a recently developed model that allows for velocity profiles that vary with height. This enables the simulation of more realistic application cases. I will discuss properties of the model and present detailed results on the hyperbolicity loss of the model. This loss of hyperbolicity can lead to numerical instabilities and results in an ill-posed system. I will show several possibilities to obtain a hyperbolic system by a systematic simplification of the model. The improved model shows good accuracy and convergence in numerical tests.

        Three Gorges Math Research Center  443002, Yichang, Hubei

        野外强奷女人视频全部过程,女人与公拘交的视频A片,女人与善牲交SPECIAL