An efficient semi-implicit time integration method for extra large eddy simulations
نویسنده
چکیده
منابع مشابه
Direct and Implicit Large-Eddy Simulation of the Taylor-Green Vortex Flow
To demonstrate the potential advantages of highorder spatial and temporal numerical methods, direct numerical and implicit large-eddy simulation of the Taylor-Green vortex flow is computed using a variable-order finite-difference code on multi-block structured meshes. The spatial operators satisfy the summation-by-parts property, with block interfaces and boundary conditions enforced with simul...
متن کاملHigh-order DNS and LES simulations using an implicit tensor-product discontinuous Galerkin method
This paper describes an efficient tensor-product based preconditioner for the large linear systems arising from the implicit time integration of discontinuous Galerkin (DG) discretizations. A main advantage of the DG method is its potential for high-order accuracy, but the number of degrees of freedom per element scales as p, where p is the polynomial degree and d is the spatial dimension. Stan...
متن کاملPreconditioned Conjugate-Residual Solvers for Helmholtz Equations in Nonhydrostatic Models
Numerical integration of the compressible nonhydrostatic equations using semi-implicit techniques is complicated by the need to solve a Helmholtz equation at each time step. The authors present an accurate and efficient technique for solving the Helmholtz equation using a conjugate-residual (CR) algorithm that is accelerated by ADI preconditioners. These preconditioned CR solvers possess four d...
متن کاملAn Efficient Implementation of Phase Field Method with Explicit Time Integration
The phase field method integrates the Griffith theory and damage mechanics approach to predict crack initiation, propagation, and branching within one framework. No crack tracking topology is needed, and complex crack shapes can be captures without user intervention. In this paper, a detailed description of how the phase field method is implemented with explicit dynamics into LS-DYNA is provide...
متن کاملHigh-Order LES Simulations using Implicit-Explicit Runge-Kutta Schemes
For many flow problems modeled by Large Eddy Simulation (LES), the computational meshes are such that a large number of the elements would allow for explicit timestepping, but the CFL-condition is highly limited by the smaller stretched elements in the boundary layers. We propose an implicit-explicit time-integration scheme that uses an implicit solver only for the smaller portion of the domain...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007