نتایج جستجو برای: flux limiter
تعداد نتایج: 109343 فیلتر نتایج به سال:
A new approach to flux limiting for systems of conservation laws is presented. The Galerkin finite element discretization / L2 projection is equipped with a failsafe mechanism that prevents the birth and growth of spurious local extrema. Within the framework of a synchronized flux-corrected transport (FCT) algorithm, the velocity and pressure fields are constrained using node-by-node transforma...
Much effort has been devoted to the study of nonlocal electron transport in laser-produced plasmas.'J Most of the work has involved the numerical solution of the electron Fokker-Planck (FP) equation in one dimension by finite difference techniques. Comparisons with standard fluid transport calculations using Spitzer-Harm (SH)3 heat flow 2, = K ~ T has revealed the occurrence of hot-electron "pr...
A new approach to flux limiting for systems of conservation laws is presented. The Galerkin finite element discretization / L2 projection is equipped with a failsafe mechanism that prevents the birth and growth of spurious local extrema. Within the framework of a synchronized flux-corrected transport (FCT) algorithm, the velocity and pressure fields are constrained using node-by-node transforma...
For several years, we have been calculating the radiation drive in laser-heated gold hohlraums using flux-limited heat transport with a limiter of 0.15, tabulated values of local thermodynamic equilibrium gold opacity, and an approximate model for not in a local thermodynamic equilibrium (NLTE) gold emissivity (DCA_2010). This model has been successful in predicting the radiation drive in vacuu...
Convection of a scalar quantity by a compressible velocity field may give rise to unbounded solutions or nonphysical overshoots at the continuous and discrete level. In this paper, we are concerned with solving continuity equations that govern the evolution of volume fractions in Eulerian models of disperse two-phase flows. An implicit Galerkin finite element approximation is equipped with a fl...
This paper presents an algorithm for unsteady transonic aerodynamic analysis by solving the two-dimensional unsteady Euler equations using a dynamic mesh algorithm. The driving algorithm is an upwind biased implicit second order accurate cell-centered finite volume scheme. The spatial discretization technique involves a naturally dissipative flux-split approach that accounts for the local wave ...
In this paper we demonstrate the performance of a slope limiting procedure combined with a discontinuous Galerkin (DG) finite element solver for 2D compressible Euler equations. The slope limiter can be categorized into van Albada type and is differentiable. This slope limiter is modified from a similar limiter used in finite volume solvers to suit the needs of the DG solver. The gradient in an...
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