Chemical Engineering - Fluid Mechanics - Discussion
Discussion Forum : Fluid Mechanics - Section 11 (Q.No. 38)
38.
The boundary layer thickness at a given section along a flat plate __________ with increasing Reynold's number.
Discussion:
1 comments Page 1 of 1.
Chayanika said:
8 months ago
The boundary layer thickness at a given section along a flat plate decreases with increasing Reynolds number.
The Reynolds number () is a dimensionless quantity used to predict flow patterns in different fluid flow situations. It is defined as where is the fluid density, is the flow velocity, is a characteristic length (such as the length of the plate) , and is the dynamic viscosity of the fluid.
In boundary layer theory, a higher Reynolds number typically indicates a thinner boundary layer. This is because as the Reynolds number increases, the inertial forces become more dominant compared to viscous forces, leading to a reduction in the boundary layer thickness.
Therefore, the correct answer is (b) decreases.
The Reynolds number () is a dimensionless quantity used to predict flow patterns in different fluid flow situations. It is defined as where is the fluid density, is the flow velocity, is a characteristic length (such as the length of the plate) , and is the dynamic viscosity of the fluid.
In boundary layer theory, a higher Reynolds number typically indicates a thinner boundary layer. This is because as the Reynolds number increases, the inertial forces become more dominant compared to viscous forces, leading to a reduction in the boundary layer thickness.
Therefore, the correct answer is (b) decreases.
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