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User who did this - Alexander Kissinger (alexk) Attached to Project - DuMuX Summary - Implementation of dispersion in 1p2c not correct for cell centred disc. Task Type - Bug Report Category - General Status - New Assigned To - Operating System - Unspecified Severity - Low Priority - Normal Reported Version - 2.9 Due in Version - Undecided Due Date - Undecided Details - I noticed that the implementation of dispersion in the 1p2c model may not be correct for applications using the cell centered discretization. The dispersion tensor needs to be evaluated at the interface between two dofs. It requires the velocity at that location. For the Box method this can easily be achieved using the potential gradient evaluated from multiple dofs in the element. For the CC method however the potential gradient calculated currently at the interface only depends on the two opposing dofs (i and j). This will generally not result in the correct velocity. A correct implementation would require an interpolation of the two cell velocities i and j at the interface. Example: Flow parallel to the interface between i and j would result in a zero velocity at the interface as there is no potential gradient between i and j and the velocity component parallel to the interface is not considered. As a result also the transverse dispersion would be zero. More information can be found at the following URL: http://www.dumux.org/flyspray/index.php?do=details&task_id=320 You are receiving this message because you have requested it from the Flyspray bugtracking system. If you did not expect this message or don't want to receive mails in future, you can change your notification settings at the URL shown above. _______________________________________________ Dumux mailing list [email protected] https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
