Question

Overall heat transfer coefficient is associated with?

(a) Conduction and radiation

(b) Conduction and convection

(c) Convection and radiation

(d) Radiation

I have been asked this question in quiz.

This intriguing question originated from Liquid- Solid Mass Transfer Correlations in chapter Heterogenous Reactions of Bioprocess Engineering

Answer 1

The correct answer is:

(b) Conduction and convection

The overall heat transfer coefficient typically accounts for the combined effects of conduction (heat transfer through a material) and convection (heat transfer between a fluid and a surface). In heat transfer processes, these two mechanisms are often the dominant modes, especially in situations involving fluid flow across surfaces. Radiation is generally considered separately unless explicitly part of the system's heat transfer process.