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Latest
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Worldtech
In a flow field, the velocity components are,
u=\left ( 6x^{2}y+t \right ),v=\left ( 3yx+t^{2}+3 \right )
and
w=\left ( 3+3t^2y \right )
. Find the velocity vector and its magnitude at a point
p\left ( 3,2,4 \right )
at
t=5
. Units of
x,y,z
are in meters and time
t
is in seconds.
fluids
on 6th May 2021 in
Fluid mechanics.
1K
1
0
techAir
A velocity field is given by
V= 5xyi+8txzj+xzk
. Find the angular velocity about the
z
-axis, acceleration and the vorticity at point
(2,3,5)
at
t = 3
. Units of
x,y,z
are in meters and time –
t
is in seconds.
fluids
on 5th May 2021 in
Fluid mechanics.
1K
1
0
Kumar59
A velocity field is given by
V=3yt\hat{i}+5x\hat{j}
. Find the equation of the streamline passing through the point
(5,3)
at
t =3
. Units of
x,y
are in meters and time-
t
is in seconds.
fluids
streamlines
on 5th May 2021 in
Fluid mechanics.
1K
1
0
Kisan Kumar
Find the acceleration of a fluid particle in the
x
direction at
(x,y) = (3,1)
for a velocity field, which is given by
\vec{V} = 3y\hat{i}+4x\hat{j}
.
x
and
y
are in meters.
fluids
on 5th May 2021 in
Fluid mechanics.
1K
1
0
Worldtech
Find the magnitude of velocity at point
(2,3)
for a two-dimensional flow field whose stream function is given by
\psi = 2x^{2}-y^{2}
.
fluids
stream functions
streamlines
on 5th May 2021 in
Fluid mechanics.
1K
1
0
techAir
Bernoulli’s Principle and Equation:
Boundary layer
fluids
incompressible flow
lift
streamlines
on 8th December 2020 in
Fluid dynamics.
1K
1
0
techAir
Consider an airfoil in a wind tunnel (i.e. a wing that spans the entire test section). Prove that the lift per unit span can be obtained from the pressure distributions on the top and bottom walls of the wind tunnel (i.e., from the pressure distributions on the walls above and below the airfoil).
fluids
on 31st October 2019 in
Aerodynamics.
3K
1
0
Worldtech
Consider a body of arbitrary shape. If the pressure distribution over the surface of the body is constant, prove that the resultant pressure force on the body is zero.
fluids
on 31st October 2019 in
Aerodynamics.
1K
1
0
techAir
Calculate the stream function and velocity potential.Using your results, show that lines of constant
\phi
are perpendicular to lines of constant
\psi
.
fluids
on 30th October 2019 in
Aerodynamics.
6K
1
0
Worldtech
Consider a flow field in polar coordinates, where the stream function is given as
ψ = ψ(r, θ)
. Starting with the concept of mass flow between two streamlines, derive Equations
\rho V_{r}=\frac{1}{r}\frac{\partial \bar{\psi }}{\partial \theta}
and
\rho V_{\theta}=-\frac{\partial\bar{\psi} }{\partial r}
.
fluids
on 30th October 2019 in
Aerodynamics.
2K
1
0
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