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Question:
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This is AI generated Response.
Asked by: anil
Created at: 2025-08-19 12:47:17
Asked by: anil
Created at: 2025-08-19 12:47:17
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The question asks:
**"The Prandtl number is greater than 1 for a fluid which is flowing over a flat plate, how is the variation of thermal boundary layer with respect to hydrodynamic boundary layer for a laminar force?"**
The **Prandtl number (Pr)** is defined as the ratio of momentum diffusivity (kinematic viscosity) to thermal diffusivity. When Pr > 1, the momentum diffusivity dominates over thermal diffusivity.
**For Pr > 1:**
- The **thermal boundary layer** is **thinner than** the **hydrodynamic boundary layer**.
**Correct Answer:**
**Thinner than the hydrodynamic boundary layer.** (Option 2)
**Explanation:**
For Prandtl number greater than 1, heat diffuses slower than momentum, so the thermal boundary layer is thinner compared to the velocity (hydrodynamic) boundary layer.
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