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Jed Brown

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13 Questions

Views Newest Activity Votes

21

30

votes

4

answers

2k

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Why is local conservation important when solving PDEs?

pde hyperbolic-pde fluid-dynamics

Apr 30 at 5:42 xzczd 288

21

24

votes

2

answers

11k

views

Why is my iterative linear solver not converging?

linear-algebra petsc preconditioning krylov-method iterative-method

Jan 7 '12 at 1:29 Community♦ 1

14

22

votes

1

answer

11k

views

Why is Newton's method not converging?

petsc pde implicit-methods

Mar 29 at 19:12 F14 5

9

19

votes

2

answers

2k

views

How to determine if a numerical solution to a PDE is converging to a continuum solution?

pde stability convergence

Jan 9 '13 at 16:09 Jed Brown 24.1k

1

18

votes

4

answers

556

views

Which methods can ensure that physical quantities remain positive throughout a PDE simulation?

pde fluid-dynamics hyperbolic-pde

Jul 14 '13 at 10:44 M.H. 31

7

17

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4

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4k

views

Portable multicore/NUMA memory allocation/initialization best practices

performance memory-management multicore

Dec 19 '13 at 10:13 eoinbrazil 111

5

16

votes

2

answers

266

views

What are the best practices for algorithms and implementation of multi-physics simulations?

pde multiphysics implicit-methods software

Dec 3 '11 at 21:26 Sean Farley 1,320

4

15

votes

3

answers

766

views

What is a scalable preconditioner for high-frequency Helmholtz?

pde

Jul 24 '13 at 18:09 Jack Poulson 7,229

6

15

votes

1

answer

3k

views

How can I estimate the condition number of a large sparse matrix using PETSc?

petsc linear-algebra

Sep 17 '12 at 14:16 Jed Brown 24.1k

2

14

votes

1

answer

531

views

Is there a multigrid algorithm that solves Neumann problems and has a convergence rate independent of the number of levels?

pde multigrid

Dec 2 '11 at 7:30 celion 331

3

13

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1

answer

326

views

How to construct well-balanced finite volume and discontinuous Galerkin methods for hyperbolic PDEs with source terms?

pde hyperbolic-pde

Nov 30 '11 at 12:02 David Ketcheson 15k

3

12

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1

answer

400

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What spatial discretizations work for incompressible flow with anisotropic boundary meshes?

pde finite-element fluid-dynamics stability incompressible

Jul 22 '13 at 12:26 Jed Brown 24.1k

3

11

votes

1

answer

229

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Statistical models for local memory/compute, network latency, and bandwidth jitter in HPC

performance hpc statistics

Apr 5 '13 at 18:33 RSFalcon7 159

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