Bruce_Z_Z

Hello, I am trying to obtain the collision force in a collision, but I am having some trouble getting the query. Based on my search, physX is using PBD (I...

Tirangle_K optimisation

2

Hi, Thanks for releasing the amazing work I ran the tshirt demo, which optimises the wind and CONSTRAINT_TRIANGLE. However, the output log shows that the k_CONSTRAINT_TRIANGLE is barely moving. The...

NaN encountered when disabling PETSc in topology opt example

6

Hi, I wonder why disabling PETSc in the in the demos/topology_optimisation example would lead to NaN problem. The code to change here is `fwd_pred = ad_wrapper(problem, linear=True, use_petsc=True, use_petsc_adjoint=False)` use_petsc_adjoint...

Matrix reduction to improve the numerical stability

4

Hi, I am having some numerical stability issue when solving with some less perfect geometries. I tried the same example on Sfepy and I found the problem can actually by...

Defining non-homogeneous dirichlet boundary conditions

2

Hi, I am currently building a simple poisson equation, as in example 1. I am using a unit-square mesh, I want to define all boundary as essential(dirichlet) but the right...

Hi, I am opening this just to ask if there any updates on the autodiff hessian? the last attempt I saw is pr #5869 but it is not been merged....

How to save a nonconforming ParMesh and corresponding dof?

1

Hi, I am trying to save the results of a parallel transient AMR problem. I tried to use GetSerialMesh(0) and GetSerialGridFunction(0, s_mesh), where I get error that nonconforming mesh and...

How to solve a nonlinear form?

1

Hi, I am trying to solve a single step compressible neohookean problem. But I always get `nans` in the newton solver. the full setup is here below. The print of...

ftetwild seems using excessive vertices.

1

Hi, I meshing 96773_sf.stl using ftetwild with a back ground mesh. My final mesh has roughly 15,000 vertices, but the log shows that at it is using up to 200,000...