All Questions
Tagged with inertia fluid-dynamics
18
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What is exactly particle inertia in a fluid-particle mixture?
In a mixture of a cylindrical particle and the carrier fluid, what exactly particle inertia refer to? (let's neglect gravitation force and Brownian motion).
When the size of particles are small (...
- 11
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23
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Can added mass depend on stochasticity of motion?
Can added mass (also called virtual mass or induced mass) of a voluminous object in a massive fluid surrounding be affected by some stochastic motion of the mass (relative motion between the object ...
- 966
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2
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687
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Can someone explain 'virtual mass' in fluids in simple words (for a dummy/high schooler)?
so I recently came across the term 'virtual mass' and when I looked up more about it, it just gave me some stuff about fluid mechanics that I dont understand properly. My understanding of virtual mass ...
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What's the reason an airplane turning 180° from strong headwinds causing it to have no ground speed does not stall?
I saw a video of a small propeller plane hovering over the ground due to strong headwinds but then turns 180 degrees and flys away. I was trying to figure out if the plane shouldn't be stalling ...
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13
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5
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How does inertia affect an object suspended in a fluid?
When I asked my physics teacher how fully submerged objects are suspended in fluids, she told me it was because the object's density was equal to that of the fluid's as a result of the net force ...
- 145
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2
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2k
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Water flowing after turning off pump
I'm pumping water with a mini pump through a plastic hose (1 meter), between two glass containers. My problem is that if I turn off the pump when the water is flowing through the entire hose, water ...
- 113
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1
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200
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How does inertia forces depend on speed?
I was learning about Reynolds number in fluid mechanics and it is given as
$$Re= \frac{\rho V L}{u} $$
Physically, compares the inertia and viscous forces acting in a fluid.
I get that density will ...
- 521
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3
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446
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Is inertia real reason for flow separation?
Consider airflow around square object, when an air particle A comes to the rear edge of an object. It is very logical that the particle would not turn at 90 degrees and follow back side of object, ...
- 133
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Question on Reynolds number using Newton's definition of inertial force and how to obtain the common expression for Reynolds number?
The concept of inertial force is traced back to Newton’s Philosophiae naturalis principia mathematica, The Principia, Newton. At the beginning of his book, Newton presents eight definitions forming ...
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3
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If the aircraft has no inertia, how will it move after losing power?
If the aircraft has no inertia, how will it move after losing power? I think because of the aerodynamic force, the aircraft stopped moving immediately. Am I right?
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Why is Disturbance Force Equal to Total Force in Stokes Flow?
So this step confuses me. Why is it true that the disturbance force is the total force in stokes flow? Any advice or guidance would be great!
From Pozrikidis' book:
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105
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Does buoyant force become less effective as acceleration increases?
Lets say a balloon with a certain amount of buoyant lift has a 2 kg mass strapped to it (including engines) and accelerates enough that it perceives a positive 2.5 g inertial force (2.5g * weight) ...
- 105
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1
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738
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Inertial stresses in Reynolds number
What is meant by the inertial stress in the definition of Reynolds number?
Reynolds number = Inertial stress/ viscous stress
- 17
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2
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164
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How to measure propulsive efficiency of a human powered boat? [closed]
I am asking for help to measure the effective propulsive force and its effect on boat glide on a human powered vessel using a paddle.
Senario
A person using a paddle to propel a boat or canoe. ...
- 101
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730
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Newton's second law of motion and viscosity [closed]
In a Coutte flow, the applied force on one of the plates can be expressed by $F = \eta A \frac{dv}{dz}$. F here can also be defined using Newton's second law of motion, $F = m \frac{dv}{dt}$.
The ...
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