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Liquid splashes - who researches it, and why don't all urinal mats look the same?

I'm not sure about research but as a civil engineering fan I am guessing that designing a shape that diminishes kinetic energy of fluid flow would be a great start. An inverse cyclonic funnel would ...
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Torque converter torque multiplication

It’s better to look at the power generated by the torque converter. The power out of the torque converter should equal the power into the torque converter multiplied by the efficiency of the torque ...
Accepted

Airflow visible over the airplane wing

Specifically, what you are seeing here is a vortex which is basically a sideways tornado. Vortices occur when moving air forms a twisted stream when flowing over an object with a complicated shape. ...
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1 vote

Airflow visible over the airplane wing

The airflow will be there visible or not. What makes it visible are the atmospheric conditions and moisture or humidity in the air so the water particles show the airflow. In wind tunnels the airflow ...
• 13.9k

Can I create a whirlpool/vortex around a horizontal axis in a flat bottle using motor?

What you are asking for, is called cavitation bubbles. Typically, this is a harmful phenomenon in the field of ship propeller screws. It is accompanied by vibration and noise, so likely you will not ...
• 99
Accepted

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

Levers and hydraulic cylinders are not typically used for the distribution of force, but are more frequently used to transmit and otherwise modify applied force. Per your reference to class one levers,...
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Direction of fluid flow

If this is a pumped system, try measuring the reaction forces when you turn the system on. For example, if you're trying to measure the direction of fluid flow in a hermetically sealed "black box&...
• 148

Direction of fluid flow

Look at or develop a flow schematic of the system. A cursury examination should give most likely flow direction. Maybe some existing ancillary measurements could give you necessary info.
• 156

Direction of fluid flow

Yes, purchase an ultrasonic flow meter. Needs a straight length of pipe and very careful placing of the sensors. However, if done well one can get good results, if not then the results can be ...
• 13.9k

Direction of fluid flow

Heat the pipe at some point, and find the direction in which heat transfers. This will give you the direction of the flow. Caution: Don't do this for flammable fluids. Thanks to @Carl Witthoft for ...

Flow of fluid in branched pipes

If we assume branch 2 is high enough so that the hydrostatic pressure of water column in 2 compensates the dynamic pressure of the horizontal flow, nothing flows out from 2. If 2 is not high enough ...
• 316
1 vote

Flow of fluid in branched pipes

Why assume Q1(Mass flow rate through opening 1)=Q3(Mass flow rate through opening 3)? The tee pipe itself impedes at least some flow between points 1 and 3 (flow rate would be at least slightly faster ...
• 1,037

Ball immersed into a fluid

If we ignore viscous forces: at the full immersion, the buoyancy is the weight of water the sphere of the ball has displaced. $$F_{B}=V_{ball}*1000kg/m^3= \frac{4}{3}\pi R^3$$ And the ball will emerge ...
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