Question
Download Solution PDFIf Reynolds number is less than 500 , the flow is said to be laminar for the:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFLaminar and Turbulent Flow Based on Reynolds Number:
The Reynolds number (Re) is a dimensionless number used to predict the flow regime in different fluid flow situations. It indicates whether the flow will be laminar or turbulent.
Explanation of the Correct Option:
- Option 4: free surface flow or open channel flow
- For free surface flow, the flow is considered laminar if the Reynolds number is less than 500. This is a specific criterion for this type of flow configuration.
Table: Flow Regimes Based on Reynolds Number
| Flow Type | Reynolds Number (Re) | Flow Regime |
|---|---|---|
| Flow through Soil | < 1 | Laminar |
| Pipe Flow | < 2000 | Laminar |
| Pipe Flow | 2000 - 4000 | Transition |
| Pipe Flow | > 4000 | Turbulent |
| Free Surface Flow | < 500 | Laminar |
| Free Surface Flow | > 2000 | Turbulent |
Last updated on May 28, 2025
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