View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0000844||OpenFOAM||[All Projects] Bug||public||2013-05-08 14:35||2015-05-01 16:42|
|Platform||Linux||OS||Ubuntu||OS Version||12.04 LTS|
|Fixed in Version|
|Summary||0000844: Faulty behaviour when using time variant uniformFixedValue BC in two-phase simulation|
|Description||I have two 2D bubble column cases. One case has a constant inlet velocity of air. The other case uses the 'uniformFixedValue' BC to ramp-up the inlet velocity to the same value as in the other case.|
The inlet volume fraction is equal to one and the interior is partially filled with water.
The case with constant inlet velocity behaves as expected. The case with the time-variant inlet velocity has no mass flow across the inlet although alpha1 and U1 are non-zero.
|Steps To Reproduce||Run the attached cases.|
I used Build: 2.1.x-0038d7805653
|Tags||No tags attached.|
timeVariantTwoPhase.tar.bz2 (7,844 bytes)
You will need to create a variant of the uniformFixedValue which also adjusts the corresponding phase flux after the update of the velocity.
It may be possible to automate this process within the solver but it requires scanning the types of the velocity BCs and perform the appropriate updates on the corresponding fluxes which may not alway have the required/expected behaviour.
||I am working on a more general solution to this problem for the next major release, in the meantime I am working on a temporary fix. Which two-phase solver are you running?|
|2013-05-08 14:35||projectionist||New Issue|
|2013-05-08 14:35||projectionist||File Added: timeVariantTwoPhase.tar.bz2|
|2013-05-08 15:03||henry||Note Added: 0002181|
|2013-06-20 14:50||henry||Note Added: 0002287|
|2015-01-01 14:09||henry||Status||new => resolved|
|2015-01-01 14:09||henry||Resolution||open => fixed|
|2015-01-01 14:09||henry||Assigned To||=> henry|