# Questions tagged [hydrostatics]

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### Is my basement flooding because the city floods a neighboring field to make an ice rink?

I bought a house about a year ago that was built in 1952, and the original house has French drains and a sump pump which keeps the basement dry. There is an extension, however, which was added at some ...
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1 vote
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### Could someone help me with this physics problem about water pressure

I am designing a rainwater collection system. Rainwater is initially collected in an open-top barrel equipped with filters and sensors. This barrel is connected to a pillow tank, a flexible water ...
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### How do I calculate magnitude of shear force per unit of length when all I'm given is the diameter?

I had a chemical engineering homework problem where I had to come up with a velocity profile for methanol flowing through a cylindrical tube, where viscosity and average velocity were given, but the ...
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### How to make a constant flow rate of water from a tank with a faucet at the bottom side?

Consider I have water tank as shown by the picture. By normal condition, the flow rate when the tank is full is higher than when the tank almost finish, and till it finally finish it will stop (in ...
108 views

### Fluid Mechanics about Hydrostatic Pressure

The rectangular gate will open authomatically, when the depth of water becomes very large. What is the minimum value of d that will cause the gate to just open? The width of the gate is 2 m.
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### Would connecting a small hydraulic pump to a larger hydraulic motor result in force multiplication?

In a hydrostatic transmission system, hydraulic pumps drive hydraulic motors (basically a reverse pump). If you were use a smaller hydraulic pump as an input and a bigger hydraulic motor as the ...
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### Are there hydraulic torque converters that are specifically built to work like reduction gearboxes?

As far as I understood from this video, there are torque converters and fluid couplers (a hydraulic clutch), but certain types of torque converters kind of work by performing the two functions at ...
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### shaft connected double water wheel to lift water back in closed loop

This is meant for mechanical closed system for hydroponics. Two wheels connected by same shaft so the wheel going down lifts the water back with the other interconnected wheel to a slight incline. I ...
95 views

### How to make a weather buoy more stable?

I'm designing a weather buoy as a school project. I have read that the metacentric height is a good measurement for buoy stability and is relatively easy to calculate. This page says the metacentric ...
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### Do axial displacement experiments under hydrostatic load scale linearly to any size?

In J. D. Stachiw's book Acrylic plastic viewports for ocean engineering applications [PDF] on page 337 it includes a Figure 7.12 [2] showing the results of applying hydrostatic loads to an acrylic ...
57 views

### Submerged fraction buoancy force

How can I calculate the height of the submerged part of a partly filled bucket? (The liquid both inside and outside is freshwater). The bucket is trapezoidal such that the volume of the submerged can ...
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### Does stress have to be isotropic in fluid under static equilibrium?

Does the Cauchy stress tensor under static equilibrium in a fluid HAVE to be isotropic? If so why? I would like to be pointed to rigorous mathematical resources that show this. What physical ...
73 views

### Could a hybrid system of mechanical levers and hydrostatic/hydraulic cylinders be able to lift 200+ kg with the force of an arm?

I don't know much about levers and hydrostatic/hydraulics myself, so I hope I don't make too many misconceptions. The idea: Hypothetically, if you had a 40km+ long indestructible lever on a ...
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### How to Calculate Pressure at a Elevated Tank's Tap

If I had two tanks of equal diameter, and one was was shorter but elevated, but the other was taller but sitting on the ground, which tap (with both taps connected to the bottom of the two tanks) ...
248 views

### What is the pressure of air trapped in glass of water turned upside down?

Consider filling a glass partially with water, covering it with a solid non-porous plate and then turning it upside down. The plate is not hinged to the glass. There is always some air trapped in the ...
876 views

### How thick must a concrete or block wall be to withstand hydrostatic pressures up to three meters' height?

I'm planning a basement 3.6m depth, ~0.5m of which extended above ground surface level, in a deep clay/alluvial terrain (bedrock inaccessible). Torrential rainfall during rainy season saturates the ...
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### How do I draw moments on hinged gates?

Hello I had a quick question regarding moments on hinged gates on submerged curves. Is there a general rule that we follow when we draw moments on hinges, do we draw the hinges in the direction the ...
527 views

### Hydrostatic forces

Hello I had a quick question regarding this homework problem. The tank in the figure is 120 cm long into the paper. Determine the horizontal and vertical hydrostatic forces on the quarter-circle panel ...
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### calculation for hydropower project

I'm studying a hydro-power project in high rise building. given a 100 story building(3 meter per floor) with 2.5 cubic meter of water per floor DAILY with 1 or more tanks within the floors and turbine ...
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### Hydrostatic transmission to directly translate movement

I have been thinking about small hydrostatic transmission to directly translate movement of stepper motor (NEMA 17-23 size, geared with 3:1 or 5:1 ratio). My design currently involves 2 identical ...
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### Computation of the moment of restoring forces for a floating vessel

Some slides associated to the book Handbook of Marine Craft Hydrodynamics and Motion Control (2021 edition) are provided by the author of the book here. At page 12 of the slides for Chapter 4, the ...
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### How is high static water pressure avoided in municipal water systems?

Most cities get their water supply from local sources (springs, rivers, lakes) so the pressure in the system is never more than what is produced by the pumps. But some cities get their water from ...
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### 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 ...
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### Hydrostatic Pressure in Soil

In a saturated soil, why is the pore water pressure equal to hydrostatic pressure? Terzaghi's principle states that the effective stress between solid particles is equal to the total stress $t$ minus ...
135 views

### Determine the length of the tube

I need to determine the size of the tube having the flow rate of the liquid (water) which is 5 ml/min and assuming the diameter of the tube is 4mm. How can i determine the size of the tube that takes ...
316 views

### Archimedes Principle Question

A Spherical buoy has a diameter of 2m and weighs 3kN. It is designed to be used in a variety or circumstances by it being floated in water and anchored to the floor with a chain. Draw the free body ...
I can deduce the Forces for F1 and F2: \begin{align} F_1 &= \dfrac{1}{2}\rho g d_1^2 \\ &= \dfrac{1}{2} \cdot (1000 \cdot 9.81) \cdot d_1^2 \cdot 8 \\ \dfrac{F_1}{d_1^2} &= 39240\text{ ...