Skip to main content

Questions tagged [bernoulli]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
2 answers
27 views

Difficulty in understanding the trigonometry in applying the momentum equation for a stream tube

As far as I can understand the sum of the applied forces is the component of the weight of the fluid in the s direction and pressure forces. Looking at the diagram ...
0 votes
1 answer
46 views

Velocity value in a pipe junction when we're applying the energy equation

I'm trying to understand how to apply the energy equation at a junction of 3 pipes. For example, when we are considering points A and D, should we consider that velocity at point D just before the ...
0 votes
3 answers
97 views

Increasing air velocity through F1 car diffuser

I am looking into F1 car aerodynamics for a course that I am taking. I understand that because of Bernoulli's law, when the velocity increases, the pressure decreases, which is good for F1 cars if we ...
1 vote
1 answer
151 views

Isn't the Bernoulli equation just a special case of the Steady-flow equation?

This question is about the following two energy balance equations (assuming no energy input/output): Bernoulli: $\frac{p}{\rho} +\frac {v^2}{2} + zg = const.$ Steady-flow: $u +\frac {p}{\rho} +\frac{...
0 votes
1 answer
33 views

Find pressure, given 2 velocities at open end of pipe and inside pipe, at different elevations

There is a tube travelling horizontally, 8m below the ground, with a diameter 15cm. It then turns upwards and at a height of 1.75m above the ground, it shoots water out with a velocity 32 m/s. Find ...
2 votes
0 answers
68 views

Theory of rotationally symmetric air cushion vehicle

I am trying to develop a theory for this situation: A small blown-up balloon is attached to the center of a compact disc; you let it float as the balloon discharges. Simplifying assumptions: ...
0 votes
0 answers
70 views

Should I pursue airfoils with higher or lower peaks (I am doing wind power in science olympiad and am designing a mini wind turbine)?

I am a beginner in wind power, but I know the basics. The Bernoulli effect: Air travelling over the curved edge travels more distance over the same amount of time than the straight side. Due to this, ...
0 votes
0 answers
6 views

What happens when electrolytic process rotameters are swapped for a much bigger one?

electrolytic process rotameter were swapped for much bigger rotameters. Inlet pipes are the still the same. What effect does the bigger rotameter have in the concentration of catholyte in the cell?
0 votes
3 answers
326 views

Can a fluid have more or less static pressure than atmospheric pressure in atmosphere?

We assume static pressure of a fluid coming out of a pipe or nozzle of gas turbine with high temperature and velocity is equal to atmospheric pressure, which confuses me for some point. Does it mean ...
0 votes
1 answer
41 views

How to quantify a misty-ness of a spray?

Picture1 source: Picture2 source: Picture3 source: The above are three spray models. The latter one is fuel injector spray. Consider I have a closed container which I can increase its pressure by any ...
-1 votes
2 answers
120 views

Incompressible Fluid Flow in horizontal pipe segment which encounters tilted pipe segment - Continuity Equation

Say that we have water flowing horizontally in a pipe of constant diameter. The continuity equation for incompressible fluids, which is a statement of mass conservation, guarantees that the flow rate ...
0 votes
0 answers
72 views

why the gage pressure of a fluid is zero at locations where the HGL intersects the fluid?

I have searched for answers to this, but so far I have not found any consistent answers. Please, may anyone help me understand this.
0 votes
1 answer
51 views

Pressure variation through reduction (Bernoulli) and pipe wall design

Let's say I have a pipe followed by a reduction and then another smaller diameter pipe continues. Using conservation of mass, the flow through the smaller diameter pipe will have higher velocity. If I ...
0 votes
1 answer
104 views

Routing the flow from an axial "box" fan

I have a project where I need to generate a certain flow rate to levitate a ping pong ball using the Bernoulli principle. From some rough calculations, I found that it would take about 30 CFM through ...
2 votes
2 answers
68 views

If a gas is pushed through a widening section of a pipe with a piston, will the pressure increase?

Imagine I have a section of pipe that increases in cross-section at some point. If the gas in the pipe before this section is being displaced with a piston, will the gas increase its pressure and ...
0 votes
1 answer
88 views

Water flow rate generated by a pressure steam tank

I have a 5 $m^3$ capacity tank that generates steam with a heat exchanger. This tank is under 15 bar pressure. The water in the bottom part of the tank does not completely vaporize because there is ...
1 vote
0 answers
65 views

Efflux velocity for system with air and liquid

I want to calculate the efflux velocity for this open vessel with area $A_1$ with a small outlet with area $A_2$ as a function of time. The atmospheric pressure is $p_0$. The vessel has height $h = h_{...
0 votes
2 answers
681 views

Is Bernoulli’s equation applicable for systems with pumps?

Please have patience with me as I have not looked at this sort of theory in many years (I am also very new to StackExchange). A question asks the following: A sloping swimming pool two-thirds full of ...
1 vote
2 answers
60 views

Can I dismiss wind loads for this solar panel configuration?

I asked this question before in the Physics Stack Exchange, but it was closed because it was considered being about engineering. That is why I am asking it here. I am planning to install some solar ...
2 votes
0 answers
70 views

Help calculating discharge rate from a reservoir as the water level drops?

I could do with some help calculating the discharge rate from a reservoir and factoring in how that flow will decrease as the head of water decreases. The information I have is: Maximum height of ...
1 vote
1 answer
242 views

Venturi Duct flow

When water flows through the converging side of a Venturi, why is it that the total head (experimental and calculated) is not constant? Could it be due to losses? Also, why was it that a lot more ...
1 vote
0 answers
32 views

Bernoulli head losses

For a Venturi, I calculated total head theoretically and experimentally. I noticed that the last point along the Venturi has not got the same as the start point total head? Shouldn’t it be the same ...
0 votes
1 answer
177 views

Calculating Pipe Leak Flow Rate

Just curious and working on some hypothetical problems on my own...I'm currently studying for my PE license. Also, trying my best here with the Latex stuff. Let's say there's a crude oil pipeline and ...
1 vote
2 answers
214 views

Bernoulli equation on moving cart

Let’s say I have moving cart with velocity U . And water from pipe flows at velocity V with respect to ground The question asks to use Bernoulli equation , pressure is atmospheric in the top If I use ...
0 votes
1 answer
100 views

Quantifying the reaction force on fixed tubing connected to a peristaltic pump

I am not sure how I should consider the forces due to hydrostatic pressure when calculating the reaction force due to a fluid being pumped through fixed tubing with a peristaltic pump that I am using ...
-1 votes
1 answer
114 views

Fluid Mechanics Question

I am preparing for GATE(Chemical). I need the answer of this question part 2 (question 54) as I am not able to find the mistake in my logic. I have applied the logic here as: Initial energy stored in ...
2 votes
1 answer
193 views

Limits of Euler-Bernoulli Beam Theory for Wide Plate in Flexure?

I'm looking for established limits or rules of thumb for the validity/accuracy of Euler-Bernoulli beam equations for particularly wide "beams". For example, a simply supported rectangular ...