16 Questions
Question 1
Multiple Choice
Vorticity
Question 2
Multiple Choice
Reynolds number in wind flow
Question 3
Multiple Choice
Surface roughness length
Question 4
Multiple Choice
Drag force equation
Question 5
Multiple Choice
Kinetic energy flux of wind
Question 6
Multiple Choice
Terminal velocity of a particle in wind
Question 7
Multiple Choice
Power coefficient of a wind turbine
Question 8
Multiple Choice
Bernoulli's principle in wind
Question 9
Multiple Choice
Wind shear
Question 10
Multiple Choice
Wind velocity vector
1 Question was hidden because it is incomplete or invalid.
The wind is heavy today.
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Vorticity
The curl of the velocity vector field representing the local rotation of the air.
Reynolds number in wind flow
The ratio of inertial forces to viscous forces in the fluid flow.
Surface roughness length
A parameter representing the height at which the wind speed theoretically extrapolates to zero.
Drag force equation
0.5 multiplied by air density, drag coefficient, reference area, and the square of the relative velocity.
Kinetic energy flux of wind
0.5 multiplied by air density, swept area, and the cube of the wind velocity.
Terminal velocity of a particle in wind
The velocity at which the gravitational force is balanced by the sum of drag and buoyancy forces.
Power coefficient of a wind turbine
The ratio of the power extracted by the turbine to the total kinetic energy flux of the wind.
Bernoulli's principle in wind
The sum of static pressure, dynamic pressure, and gravitational potential energy density remains constant along a streamline.
Wind shear
The variation of wind velocity occurring along a direction perpendicular to the flow.
Wind velocity vector
The derivative of the displacement vector of an air parcel with respect to time in a non-inertial reference frame.
Adiabatic lapse rate
The rate at which the temperature of an air parcel changes as it rises or sinks without heat exchange.
Geostrophic wind balance
The equilibrium state where the pressure gradient force is exactly balanced by the Coriolis force.
Pressure gradient force
The negative gradient of the pressure field divided by the density of the air.
Cyclostrophic balance
A state where the pressure gradient force is balanced by the centrifugal force in a small-scale vortex.
Coriolis acceleration
2 multiplied by the cross product of the angular velocity of the Earth and the wind velocity vector.