Talk:Double diffusive convection

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Equations are not in the referenced works

The equations in the section "Governing Equations" are not the same equations that are in the cited work, and seem wrong in several places. Perhaps due to copy&paste from different sources?

I propose removing the section "Governing Equations".

Some of the bits that seem wrong:

U is treated as a vector field in some parts ("div U = 0", scalar product in "U.grad(T)", etc) and as a scalar field in others ("gradU", there's a laplacian of U as well). U is defined as a scalar field ("U [is] the velocity component in horizontal direction").
The rank of the terms in the second equation is not the same. On the RHS, a scalar (?) field (lap U) is added to a vector field ("k" is defined as a vector).
W is defined just after the first set of equations, however, W doesn't appear anywhere in that set of equations.

In the cited work (Schmitt, R.W., 1979, doi:10.1016/0198-0149(79)90083-9), that first set of equations do not appear. The reference given for the second set of equations (Sreenivas, K.R., 2009, doi:10.1063/1.3070527) does not include those equations.

Joaosampaio (talk) 12:18, 17 December 2017 (UTC)[reply]

Yes, the equations have some problems. I think it is helpful to show the equations, so I propose fixing them rather than removing the section altogether.

U should really be replaced with a boldface v everywhere in the first set of equations, such as in the article on magnetohydrodynamics, and understood as a vector field whose components are U and W. If this change is made, then the dU/dt equation becomes a dv/dt equation where every term has the correct rank. Adr.Fraser (talk) 17:50, 14 July 2022 (UTC)[reply]