Engineering Stack Exchange
Engineering Stack Exchange

Questions tagged [liquid]

For questions about the specific properties of materials in their liquid states, and their engineering applications, such as in hydraulics, heating/cooling systems, and chemical reactions.

Questions about the properties of liquids or systems where the properties of liquids play a crucial role.

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Is it possible to "pump" a powder?

Is it possible to "pump" a powder the same way liquids can be pumped? If so, what are the challenges? If not, what are some alternatives?
peterh
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What liquid crystals are used most frequently in displays?

Is there a specific chemical that is used frequently in the production of liquid crystal displays? During my internet research so far, it seems as if the specific chemical composition of the liquid crystal does not matter very much. This website…
DK2AX
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Liquid splashes - who researches it, and why don't all urinal mats look the same?

I normally wear shorts in the summer, at which point I become very aware of the problem every man knows about - splashback of pee from urinals. No matter how you stand or aim, the inherent splashing effect of a stream of liquid hitting a surface…
Graham
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What type of liquid flow control could this device use?

I am trying to figure out what kind of device is being used to stop and start the flow of liquid inside this device. Below is a link to the device. It looks too small to be a solenoid or a pump. How else would they do it? I heard somewhere it may be…
JoeTaylor
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Mirror-like reflective liquid crystal display panel

I can't find any information about this on Google, so I thought I'd ask it here. I am looking for a LCD Screen-like panel which uses a mirror-like liquid crystal so that I can make a pane of glass into a mirror electronically. The "pixels" do not…
vaid
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How to raise viscosity of water

I need to measure a machine for a liquid of which I know the viscosity (89 Kinetic Viscosity) but I don't have the liquid at hand. Is there a clever way of increasing viscosity of water to 89?
John Snow
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In marker pens, why does the ink travel to the nib?

This question is specifically for felt tip pens and marker pens that contain a felt inner tube. The parts of the pen are: - the body case - the felt nib - the felt inner tube I do not understand is why the ink within the felt inner tube moves up…
Fred Johnson
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Finding liquid viscosity

I'd like to calculate the viscosity of a liquid in a container systematically (and feed the results back to a computer). I only have basic knowledge of physics and mechanics. I think that a motor with a tiny "windmill" constantly turning inside the…
Lucien
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How to design spray nozzle (like in pulverizer) for 3d print?

How do spray nozzles work? How do they convert liquid to aerosol? Is it possible to print tiny spray nozzles from metal powder?
Robotex
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Optimized water droplet formation

What is the best way to "shatter" a water drop falling purely under gravity if the objective is to break it into as many droplets and as fine (smallest diameter) as possible? Should the surface be perpendicular to the direction of the falling drop?…
Francois Grobler
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Temperature of water decreasing during boil

I am trying to understand this phenomenon that I have noticed with my system (40L capacity boiler with a NTC thermistor located at the bottom). When boiling 10 Litres, the temperature reading reaches around 100C when a physical boil is noticed. Then…
Divraj
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Will an electric water pump has slower flow if it must pump through a longer tube?

I am planning a series of ponds, where the first pond (near the source of electricity) has the highest water level, the water flows to the second, lower pond, via a small water fall, and to a third, lowest pond, again via a small water fall. The…
Village
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Is it possible to use a laser push a 100 micron diameter droplet of water through a fine mesh?

Context I've had the thought of a printing device that uses a thin grid that has holes small enough to allow suspension of a water based ink above a sheet of paper using surface tension. I've concepted how such a device would be used to form an…
Ravenscroft
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Is there a type of check valve that allows gas to flow in both direction but stops liquid from flowing back?

I have a pressure regulator to maintain a specified pressure in a vessel that also contains a liquid. The regulator can pressurize or relieve pressure of the vessel. I want to prevent the liquid from flowing back to the regulator while keeping the…
Paskoual
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Valve advice for chiller test rig

I am in the process of designing a chiller test rig, of which a very simplified diagram would be (the quick coupling might just be replaced by a non-return valve): I am struggling to find the type of valve I need where the "??" is. The purpose of…
am304
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