GATE ME
Fluid Mechanics
Boundary Layer
Previous Years Questions

## Marks 1

Within a boundary layer for a steady incompressible flow, the Bernoulli equation
Consider an incompressible laminar boundary layer flow over a flat plate of length $$L$$, aligned with the direction of an incoming uniform free strea...
If $$'x'$$ is the distance measured from the leading edge of a flat plate, then laminar boundary layer thickness varies as
Flow separation in flow past a solid object is caused by
The necessary and sufficient condition which brings about separation of boundary layer is $${{dP} \over {dx}} > 0$$
As the transition from laminar to turbulent flow is induced in a cross flow past a circular cylinder the value of the drag coefficient drops.
The predominant forces acting on an element of fluid in the boundary layer over a flat plate in a uniform parallel stream are:
A streamlined body is defined as a body about which

The velocity profile inside the boundary layer for flow over a flat plate is given as $${u \over {{U_\infty }}} = \sin \left( {{\pi \over 2}\,{y \ove... A steady laminar boundary layer is formed over a flat plate as shown in the figure. The free stream velocity of the fluid is$${U_0}.$$The velocity p... Air ($${\rho = 1.2\,\,kg/{m^3}}$$and kinematic viscosity,$${v = 2 \times {{10}^{ - 5}}{m^2}/s}$$) with a velocity of$$2m/s$$flows over the top ... An incompressible fluid flows over a flat plate with zero pressure gradient. The boundary layer thickness is$$1mm$$at a location where the Reynolds ... Consider a steady incompressible flow through a channel as shown below. The velocity profile is uniform with a value of$${u_0}$$at the inlet secti... Consider a steady incompressible flow through a channel as shown below. The velocity profile is uniform with a value of$${u_0}$$at the inlet secti... A smooth flat plate with a sharp leading edge is placed along a gas stream flowing at$$U = 10\,m/s.$$The thickness of the boundary layer at section ... A smooth flat plate with a sharp leading edge is placed along a gas stream flowing at$$U = 10\,m/s.$$The thickness of the boundary layer at section ... For air flow over a flat plate, velocity$$(U)$$and boundary layer thickness$$\left( \delta \right)$$can be expressed respectively, as$$${U \ove... ## Marks 5 The velocity profile across a boundary layer on a flat plate may be approximated as linear${V_x}\left( {x,y} \right) = {{{V_0}y} \over {\delta \le...
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