[Einstein Toolkit] #1320: reconstruct_Wv with cell centering violates angular momentum conservation
#1320: reconstruct_Wv with cell centering violates angular momentum conservation -----------------------------------+---------------------------------------- Reporter: rhaas | Owner: rhaas Type: defect | Status: new Priority: minor | Milestone: Component: EinsteinToolkit thorn | Version: Keywords: GRHydro | -----------------------------------+---------------------------------------- we have a bug report that at least for cell centering the option reconstruct_Wv (off by default) does not conserve angular momentum. This system where this was observed was a torus around a BH.
#1320: reconstruct_Wv with cell centering violates angular momentum conservation ------------------------------------+--------------------------------------- Reporter: rhaas | Owner: rhaas Type: defect | Status: new Priority: minor | Milestone: Component: EinsteinToolkit thorn | Version: Resolution: | Keywords: GRHydro ------------------------------------+---------------------------------------
Comment (by reisswig@…):
What reconstruction method was used?
#1320: reconstruct_Wv with cell centering violates angular momentum conservation ------------------------------------+--------------------------------------- Reporter: rhaas | Owner: rhaas Type: defect | Status: new Priority: minor | Milestone: Component: EinsteinToolkit thorn | Version: Resolution: | Keywords: GRHydro ------------------------------------+---------------------------------------
Comment (by knarf):
"We do have a bug report" isn't really so helpful. It would be interesting to have a parameter file that we could actually run and see the effect. Otherwise how should we go about even reproducing it?
#1320: reconstruct_Wv with cell centering violates angular momentum conservation ------------------------------------+--------------------------------------- Reporter: rhaas | Owner: rhaas Type: defect | Status: new Priority: minor | Milestone: Component: EinsteinToolkit thorn | Version: Resolution: | Keywords: GRHydro ------------------------------------+---------------------------------------
Comment (by rhaas):
I suspect that one could use a rotating NS or so for testing. Let's wait if Vassilios has more details that he can provide. So far the ticket is mostly a reminder for Christian and I (who wrote the code) to look into this.
CR: I don't know what reconstruction was used. We will have to ask.
#1320: reconstruct_Wv with cell centering violates angular momentum conservation ------------------------------------+--------------------------------------- Reporter: rhaas | Owner: rhaas Type: defect | Status: new Priority: minor | Milestone: Component: EinsteinToolkit thorn | Version: Resolution: | Keywords: GRHydro ------------------------------------+---------------------------------------
Comment (by knarf):
Ok. Having one of them open the ticket and talk to us would be helpful. :)
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