In case of fluid flowing on horizontal surface the flow of fluid becomes unsteady when Reynolds number (Rn) is (a) less than 499 (b) between 500 - 999 (c) between 1000 - 1999 (d) greater than 2000

Answer: (d). Reynolds number ranges: Rn 2000 turbulent. Fully irregular (unsteady, turbulent) flow sets in when Rn > 2000. So the answer is (d) greater than 2000.

In case of fluid flowing on horizontal surface the flow of fluid… | MHT CET 2026 (18 Apr, Shift 2)

Q2MHT CET 2026 · 18 APR · SHIFT 2Easy

Types of Flow, Reynolds Number & Continuity

In case of fluid flowing on horizontal surface the flow of fluid becomes unsteady when Reynolds number (Rn) is

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Answer: (d)

Reynolds number ranges: $R_n < 1000$ streamline, $1000$ to $2000$ transition, $R_n > 2000$ turbulent.
Fully irregular (unsteady, turbulent) flow sets in when $R_n > 2000$ .
So the answer is (d) greater than 2000.

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