SwePub
Tyck till om SwePub Sök här!
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "AMNE:(NATURAL SCIENCES Mathematics Computational Mathematics) ;pers:(Kreiss Heinz Otto)"

Sökning: AMNE:(NATURAL SCIENCES Mathematics Computational Mathematics) > Kreiss Heinz Otto

  • Resultat 1-10 av 35
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Kreiss, Gunilla, et al. (författare)
  • Stability of viscous shocks on finite intervals
  • 2008
  • Ingår i: Archive for Rational Mechanics and Analysis. - : Springer Science and Business Media LLC. - 0003-9527 .- 1432-0673. ; 187:1, s. 157-183
  • Tidskriftsartikel (refereegranskat)abstract
    • Consider the Cauchy problem for a system of viscous conservation laws with a solution consisting of a thin, viscous shock layer connecting smooth regions. We expect the time-dependent behavior of such a solution to involve two processes. One process consists of the large-scale evolution of the solution. This process is well modeled by the corresponding inviscid equations. The other process is the adjustment in shape and position of the shock layer to the large-scale solution. The time scale of the second process is much faster than the first, 1/nu compared to 1. The second process can be divided into two parts, adjustment of the shape and of the position. During this adjustment the end states are essentially constant. In order to answer the question of stability we have developed a technique where the two processes can be separated. To isolate the fast process, we consider the region in the vicinity of the shock layer. The equations are augmented with special boundary conditions that reflect the slow change of the end states. We show that, for the isolated fast process, the perturbations decay exponentially in time.
  •  
2.
  • Motamed, Mohammad, et al. (författare)
  • Finite Difference Schemes for Second Order Systems Describing Black Holes
  • 2006
  • Ingår i: Physical Review D. Particles and fields. - 0556-2821 .- 1089-4918. ; 73:12, s. 124008-1-124008-14
  • Tidskriftsartikel (refereegranskat)abstract
    • In the harmonic description of general relativity, the principal part of Einstein's equations reduces to 10 curved space wave equations for the components of the space-time metric. We present theorems regarding the stability of several evolution-boundary algorithms for such equations when treated in second order differential form. The theorems apply to a model black hole space-time consisting of a spacelike inner boundary excising the singularity, a timelike outer boundary and a horizon in between. These algorithms are implemented as stable, convergent numerical codes and their performance is compared in a 2-dimensional excision problem.
  •  
3.
  •  
4.
  • Browning, Gerald, et al. (författare)
  • Mesh refinement
  • 1973
  • Ingår i: Mathematics of Computation. - 0025-5718 .- 1088-6842. ; 27:121, s. 29-39
  • Tidskriftsartikel (refereegranskat)
  •  
5.
  •  
6.
  •  
7.
  •  
8.
  •  
9.
  •  
10.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 35

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy