Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of ?
Correct answer: B. Grashoff number & Prandtl number
- A. Grashoff number
- B. Grashoff number & Prandtl number
- C. Reynolds number
- D. Grashoff number & Reynolds number
Explanation
The transition criterion in free convection is expressed through the Rayleigh number, Ra = Gr·Pr, so both the Grashof and Prandtl numbers are involved. This distinguishes it from forced-convection transition, which is primarily based on Reynolds number.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Heat Transfer Operations questions
Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?
Ammonia leakage in the refrigeration system is detected by_________________?
A high pressure boiler generates steam at a pressure greater than _____________________ kg/cm2 ?
Water-tube boiler is the one, in which _____________________?
Wavelength of radiation emitted by a body depends on the ________________ of its surface?
Which of the following phenomenon will exhibit the minimum heat transfer ?