<div dir="ltr">PETSc,<div><br></div><div>I had few questions regarding adaptive time stepping inTS.</div><div><br></div><div>- Can temporal adaptivity in TS ensure non-negative solution of a PDE?</div><div>- For coupled multi-physics problems, can TS ensure non-negative solution for only one of the physics (eg. ensuring non-negative surface pressure for a coupled surface-subsurface flow simulation)?</div>
<div>- Are there examples for such a case?</div><div><br></div><div>At this stage I'm interested in finding out if ensuring non-negative solution is feasible and what would be required for such an implementation. If you could point me to some references that would be much appreciated.</div>
<div><br></div><div>Thanks,</div><div>-Gautam.</div></div>