Owner

SimVascular

6 indexed repositories · View on GitHub

svMultiPhysics
svMultiPhysics is an open-source, parallel, finite element multi-physics solver.

C++ · 45 stars
svOneDSolver
A C++ solver for blood flow and pressure in deformable 1D hemodynamic networks

C++ · 22 stars
svZeroDSolver
A C++ lumped-parameter solver for blood flow and pressure in hemodynamic networks

C++ · 22 stars
svVascularize
The synthetic vascular generation Python package.

Python · 19 stars
vascularmodel

HTML · 5 stars
simvascular.github.io

HTML · 3 stars

Beginner friendly Everything

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Convergence issues with more complex test cases containing ChamberSphere Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SimVascular/svZeroDSolver#246 · Opened Sep 18, 2026
Line search in Integrator for 3D-0D coupling Open

enhancement

SimVascular/svMultiPhysics#648 · 1 reaction · 1 assignee · Opened Sep 16, 2026
FSILS RCS preconditioner alters small matrix diagonals and degrades convergence Open

bug

SimVascular/svMultiPhysics#646 · 1 assignee · Opened Sep 15, 2026
Specifying number of nodes per unit length as opposed to nodes per vessel Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 55/100

SimVascular/svVascularize#111 · 1 comment · Opened Sep 14, 2026
Error in lumen_inlet.flow data Open

bug

SimVascular/svMultiPhysics#643 · 1 comment · 1 assignee · Opened Sep 9, 2026
Temporal instability in electromechanics force-fiber-stretch feedback Open

SimVascular/svMultiPhysics#641 · 7 comments · 2 assignees · Opened Sep 4, 2026
Fiber stretch rate always evaluated to zero for active stress coupling Open

bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

SimVascular/svMultiPhysics#639 · Opened Sep 4, 2026
svMultiPhysics/tests/cases/fluid/dye_AD does not output Concentration Open

bug

SimVascular/svMultiPhysics#638 · 1 comment · 1 assignee · Opened Sep 4, 2026
Initialize BCs coupled to the svZeroDSolver Open

enhancement

SimVascular/svMultiPhysics#636 · 1 assignee · Opened Sep 3, 2026
Strain-dependent active stress model Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 48/100

SimVascular/svZeroDSolver#244 · Opened Sep 2, 2026
Uniform application of active stress across material models Open

bug enhancement

SimVascular/svMultiPhysics#635 · 4 comments · 1 assignee · Opened Sep 2, 2026
Shape function gradients are incorrectly assumed to be constant within wedge elements Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 50/100

SimVascular/svMultiPhysics#634 · 4 comments · Opened Sep 1, 2026
Improve the PyPI project page for first-time users Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

SimVascular/svVascularize#101 · Opened Sep 1, 2026
Templated viscous stress models Open

enhancement

SimVascular/svMultiPhysics#633 · 8 comments · 1 assignee · Opened Aug 31, 2026
Optimize double dot product and dyadic product Open

enhancement

SimVascular/svMultiPhysics#632 · 3 comments · 1 assignee · Opened Aug 30, 2026
Add units to simulation results files Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

SimVascular/svMultiPhysics#629 · 2 comments · Opened Aug 28, 2026
Improve RCR initialization script to handle coupled 0D files Open

enhancement

SimVascular/svMultiPhysics#628 · 1 assignee · Opened Aug 28, 2026
Encapsulate spatial searches into class Open

enhancement

SimVascular/svMultiPhysics#621 · 1 comment · 1 reaction · 1 assignee · Opened Aug 27, 2026
Fluid state cannot be fully initialized Open

enhancement

SimVascular/svMultiPhysics#614 · 16 comments · 1 assignee · Opened Aug 22, 2026
Add residence time to scalar transport Open

enhancement

SimVascular/svMultiPhysics#612 · 4 comments · 2 assignees · Opened Aug 20, 2026
Add Land-Niederer Active Stress Model Open

enhancement

SimVascular/svMultiPhysics#606 · 5 comments · 1 reaction · 1 assignee · Opened Aug 19, 2026
Inverse_darcy_permeability hardcoded to 0.0 in FSI assembly (fsi.cpp:211/238) — Brinkman drag not applied to porous fluid subdomains in FSI Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

SimVascular/svMultiPhysics#603 · Opened Aug 18, 2026
Add a prestress contribution to stress tensor results output Open

enhancement

SimVascular/svMultiPhysics#595 · 1 assignee · Opened Jul 31, 2026
Add WSL2 guidance for Windows users Open

enhancement

SimVascular/simvascular.github.io#103 · 6 comments · 2 assignees · Opened Jul 22, 2026
Refactoring of parameter management Open

enhancement OOP Refactor

Difficulty 5/5 Over a week Newbie friendliness 25/100

SimVascular/svMultiPhysics#591 · Opened Jul 15, 2026
Creation of CFD User Guide Open

documentation

SimVascular/simvascular.github.io#100 · 19 comments · 2 assignees · Opened Jul 14, 2026
Incomplete Implementation for Windows OS in svzerodsolver.cpp: Reads input files but does not save path for output.csv Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

SimVascular/svZeroDSolver#238 · Opened Jul 9, 2026
Solver divergence with large quadratic resistances. Open

bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

SimVascular/svZeroDSolver#237 · 2 comments · Opened Jul 2, 2026
Implementing Quadrature Module Open

OOP Refactor

SimVascular/svMultiPhysics#580 · 1 comment · 1 assignee · Opened Jul 2, 2026
Refactor the time iteration loop Open

enhancement

SimVascular/svMultiPhysics#576 · 9 comments · 1 reaction · 1 assignee · Opened Jun 26, 2026
Spatial bounds on electrophysiology applied stimulus Open

enhancement

SimVascular/svMultiPhysics#572 · 9 comments · 1 assignee · Opened Jun 23, 2026
Add writing ybar to VTK results files Open

enhancement

SimVascular/svMultiPhysics#571 · 7 comments · 1 assignee · Opened Jun 22, 2026
f.connect() fails to generate connections "Could not find optimal assignment" Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

SimVascular/svVascularize#67 · Opened Jun 22, 2026
Add adaptive mesh refinement based on solution variables Open

enhancement future development

SimVascular/svMultiPhysics#570 · 6 comments · 1 assignee · Opened Jun 19, 2026
Add AGENTS.md Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

SimVascular/svZeroDSolver#232 · Opened Jun 5, 2026
Extend CANN implementation for additional invariants, fiber recruitment and dispersion Open

enhancement

SimVascular/svMultiPhysics#560 · 5 comments · 2 assignees · Opened Jun 2, 2026
2D struct simulation fails Open

bug

SimVascular/svMultiPhysics#557 · 8 comments · 1 assignee · Opened May 27, 2026
User defined inlet velocity profile fails Open

bug

SimVascular/svMultiPhysics#555 · 4 comments · 1 assignee · Opened May 27, 2026
Optional valve-state freezing for piecewise valves to prevent Newton cycling with 3D-0D coupling Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SimVascular/svZeroDSolver#228 · 9 comments · Opened May 21, 2026
Fiber generation following Bayer's method does not follow original convention. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

SimVascular/svMultiPhysics#551 · 5 comments · Opened May 20, 2026
Follow-up polishing from #540 and #578 (Object oriented refactoring of ionic models and active stress) Open

OOP Refactor

Difficulty 5/5 Over a week Newbie friendliness 35/100

SimVascular/svMultiPhysics#549 · 1 comment · Opened May 19, 2026
Meaning of the enum class OutputNameType Open

OOP Refactor

Difficulty 5/5 Over a week Newbie friendliness 35/100

SimVascular/svMultiPhysics#548 · Opened May 19, 2026
Initialize the pressure field using a single scalar value Open

enhancement

SimVascular/svMultiPhysics#546 · 3 comments · 1 assignee · Opened May 15, 2026
0117_H_PULM_ALGS has a model creation issue Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

SimVascular/vascularmodel#35 · 2 comments · Opened Apr 30, 2026
0116_H_PULM_ALGS has a model creation error Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SimVascular/vascularmodel#34 · 13 comments · Opened Apr 30, 2026
0115_H_PULM_ALGS also has a model and mesh creation error Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

SimVascular/vascularmodel#33 · 1 comment · Opened Apr 30, 2026
Model creation throws a warning for 0114_H_PULM_ALGS Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

SimVascular/vascularmodel#32 · 6 comments · Opened Apr 29, 2026
0002_H_AO_SVD: volume mesh nodes and face nodes don't match Open

bug

SimVascular/vascularmodel#31 · 7 comments · 1 assignee · Opened Apr 25, 2026
Bug report: centerline generation fails with the pulmonary model 0082_H_PULM_H Open

bug

SimVascular/vascularmodel#30 · 5 comments · 1 assignee · Opened Apr 22, 2026
Pulmonary models derived from CT and MR do not show up for CT or MR filters Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

SimVascular/vascularmodel#29 · Opened Apr 15, 2026

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