Question

Which of these terms represent convection in the momentum equation?

(a) (div(uvec{V}))

(b) (div( ho vec{V}))

(c) ( abla .(uvec{V}))

(d) (div( ho uvec{V}))

Answer 1

Correct answer is (d) (div( ho uvec{V}))

For explanation I would say: : From general conservation equation, the convection term is div(ρuΦ). For momentum equation, (Phi=vec{V}). So, the convection term in momentum equation is div(ρu(vec{V})).