Which term represents the diffusion of the property Φ?
(a) div(Φ)
(b) div(ΓgradΦ)
(c) curl(Φ)
(d) curl(ΓgradΦ)
I got this question during a job interview.
Query is from General Transport Equation topic in section Governing Equations of Fluid Dynamics of Computational Fluid Dynamics