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Questions tagged [open-channel-flow]

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Overflowing water flow between two prisms

I have system as seen in the figure. The pump will supply constant volumetric flow rate and the water will fill the first rectangular prism. I couldnt find the water height after water starts to ...
Ali Akbaş's user avatar
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How can depth of flow in a supercritical flow get affected when the flow passes through a constriction of width less than the critical width?

When a supercritical flow approaches a constriction having a width less than the critical width does the depth of supercritical flow decrease upstream so as to increase specific energy? If it does ...
inquisitive learner's user avatar
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Tipped triangular weir

Can someone tell me what influence an angled wall has on the flow over a triangular weir compared to a "normal" vertical one if the wall is angled against the upstream as in the picture?
Nil's user avatar
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How does decreasing the cross-sectional width of a channel impact steady flow?

The continuity equation states that for a constant mass flow rate, if the cross sectional area of a channel is decreased, then velocity is increased. What happens if the channel has high walls and is ...
ARJ's user avatar
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2 answers
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How can I size a sump area to act as an energy dissipator?

I have a proposed stormwater design which will necessitate some very large diameter pipe installed near the surface to minimize constructability issues. However, near the end of the run, it will be ...
Pyrotechnical's user avatar
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Turbulent boundary layer development in channel flow

I'm currently working on my Bachelor's thesis about the numerical simulation of a turbulent air flow through a rectangular channel. As part of that I'd like to compare my results to empirical ...
Simon Henn's user avatar
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2 answers
460 views

determine if the flow is laminar or turbulent [closed]

what would be the the type of flow if the water flows through stainless steel channel? would it be a laminar flow or turbulent flow. I assume the adhesive force of water to stainless steel is minimum.
Physical's user avatar
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1 answer
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The mechanism of submerged hydraulic jump

Is there a mathematical analysis of the submerged hydraulic jump, such as under what condition it is formed, the speed and trajectory of the circular flow therein, etc.? Is there a good mathematically ...
Hans's user avatar
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2 answers
758 views

Open Channel flow with pressure losses - flow depth?

In a horizontal channel that feeds off a river, does the head/pressure loss due to friction, turns etc in the channel translate to a drop in the water level between its inlet and outler? If so, could ...
James's user avatar
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3 votes
3 answers
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How to make sure a pipe does not take all of the water from a stream?

I am trying to design a pipe which takes water from a river and transports it to a reservoir. However, I do not want my pipe to take all of the water from stream, because that will create all sorts ...
Jake Wrightson's user avatar
3 votes
1 answer
575 views

Ideal funnel design for powders

I'm designing a funnel/bottle for a powder. My goal is to have all of the bottle's powder contents come out when inverted. However, the powder has a tendency to stick to itself (like flour or brown ...
Davbog's user avatar
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Determining the Steady Discharge Between Two Reservoirs

A uniform pipeline, $5km$ in length, $100mm$ in diameter and with a roughness size of $0.03mm$, conveys water between two reservoirs. The difference in water level between the reservoirs is $...
Jake Wrightson's user avatar
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Water Pump Thrust Calculation

If I have a water pump positioned horizontally where the diameter of the inlet and the outlet of the water is equal: Din = Dout. If the volume flow rate is know experimentally by measuring the time ...
Mei's user avatar
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2 votes
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Difference in flow measurements in an open channel

I'm undertaking a civil hydraulics question. It involves the flow of water in an open channel down a river at $5m^3/s$ until the flow is split in two by a weir acting as a sluice gate allowing flow ...
Nathan Lowe's user avatar
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1 answer
1k views

Why is pressure head ignored in open channel flow?

Also, what does this excerpt from Wikipedia mean However, since with open channel flow, the water surface is open to the atmosphere, the pressure term between two points has the same value and is ...
Parmod Siroha's user avatar
1 vote
2 answers
3k views

Open Channel Flow with no slope

I'm struggling to confirm the Velocity in an open channel flow with 0 percent slope. Water enters the channel from an open pipe. The rectangular channel dimensions (66' Long x 3.33' W x 6.75' D) and ...
user10149's user avatar
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1 answer
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How to model subcritical open channel flow?

I'm trying to model subcritical flow in an open channel with a side weir of certain small length at the middle of the main channel, so a certain amount of fluid discharges through the weir. I need to ...
Ls Staley's user avatar
4 votes
1 answer
4k views

Where exactly will a hydraulic jump occur?

I know that an hydraulic jump can occur only when the Froude number is higher than 1 (supercritical flow), and I am familiar with the Bélanger equation. However, I feel like I have a fundamental ...
user2554's user avatar
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2 answers
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How to calculate how much flow there is from a single source to multiple drains

Assuming that I have a water source ($Q$) that can flow into 3 drains ( $Q_1$, $Q_2$, $Q_3$): Assume that we know that The drain geometry is predetermined—we know the $x,y,z$ coordinates of the ...
Graviton's user avatar
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2 votes
2 answers
39k views

Reynolds Number for a Rectangular Duct

For a National Board Exam Review: Calculate the Reynold's Number, $Re$ for water at 20 °C flowing in an open channel. The water flowing at a volumetric rate of 200 gal/sec. The channel has a ...
james's user avatar
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