Question

In terms of heat transfer, what does div(ΓgradΦ) mean?

(a) Heat radiation

(b) Heat convection

(c) Thermal flow

(d) Heat conduction

This question was posed to me in an internship interview.

Question is from General Transport Equation in portion Governing Equations of Fluid Dynamics of Computational Fluid Dynamics

Answer 1

Correct option is (d) Heat conduction

For explanation I would say: Diffusive heat transfer is called heat conduction. This refers to the process of heat transfer without any movement of the particles.