Transport equation formula

Hi there,

For my master thesis i’m consulting a lot the documentation provided by the site, which explains very well all the topics about CFD and it’s theory, However i have a doubt about the expression of the transport equation here provided: documentation.

Should be the convective term put on the LHS of the equation? With a plus near the temporal derivative?

In fact if i put the densitiy in the place of the scalar and i neglect the diffusive and source term (i.e the continuity equation) i get a wrong expression of the mass conservation in differential form (see here).

Can anyone explain to me? Thank you a lot.

Hi @Il_Briga, thanks for posting on the forum and welcome to the SimScale Community :handshake:

Yes, it does seem like the signs were switched here, I’ve just created a ticket for its correction. Thanks for spotting this!

Cheers
Igor