True, the density, viscosity and temperature will change so the Reynolds Number will follow and the friction factor will also change. Probably could be solved in a CFD program as they allow an input section to be assigned a mass flow then any section can be a fan followed by heating and a...
It seems all agree that the heater increases the tempearature and hence its volume which directly means it needs to go faster to exit the dryer nozzle.
The pressure drop created by an increase in velocity will be both from friction losses and exit losses from the nozzle.
To counter the...
OK so let's rotate the coil by 90 degree in such a way that the exit is above the entry. Now the fluid leaving is higher and so has potential energy increase, that surely requires a force.
So you are saying there is no force involved here? It seems moving a mass from plane to another needs a force otherwise this this neat little tube could represent, say, a tube train tunnel where we get free transport. Problem of mass transport solved!
For sure there is a force.
The coil causes a pressure drop so the inlet pressure will be higher than the outlet pressure. As pressure over an area relates to force there will be an imbalance. Also the friction will allow heat to dissipate along the coil and so an energy transfer happens there. The differential pressure...
The resonant behaviour is interesting as it may be the three of you could get get the lift into resonance and exceed the 2500lb limit, it has happened many times in bridges where synchronous excitation of people transversing it cause resonant problems. Take the Albert Bridge which actually has a...
Some basic numbers, liquid at 140C and 32 bara is sqirted from nozzle into the atmosphere so around 1 bara. The exit temperature after the process stabalises is around 18C. This conditins should be all gas and superheated by about 14C but in the expansion process some liquid becomes supercooled...
I have a liquid that is stored at pressure. This liquid is then released to a lower pressure where it should become a gas. The problem is how long does it take for the liquid to turn to gas.
There must be some delay - even a very small one - but how to calculate it.
Example - a jet of...
This is a supersonic case where the wind tunnel is driven by a supersonic flow and mixes with the entrained flow to get medium flow with more volume. Continuity is considered and essential to help solve the combined flow.
I just hope when it is built and tested it meets the results from the...
Many thanks for your comments. In the meantime further studies have resulted in no firm resolution of which model to use.
There have been many similar post on the momentum versus energy discussion and many interesting answers but non seem to catogorically put one model as the preferred...
I have a closed system (a wind tunnel with entrained air) where a high speed air flow sucks up ambient air to provide a combined flow of the 2 air streams over the model. The resulant flow has a mass flow rate equal to the combination of the 2 air streams.
However in calculating the velocity...
I am having a problem finding out how long it takes for a volatile liquid to evaporate when suddenly the pressure is reduced.
For example - let's assume liquid butane at 8 bara is suddenly dropped to 1bara, the process of liquid turning to gas is not instantaneous so how long does it take...
If Higgs is predicted by the SM and we argue its existence based on the model then it must exist as a mass. Some however are not so sure that the SM or even SS predict the Higgs field as a new one and others even propose it may be a quark or lepton field and if so it would be massless and as...
Hello
I am trying to understand the function of the Higgs bosun which appears to lend mass to other particles. But what if it has no mass and is purely a force? Could the Higgs force be assimulated by another particle but at the same time it also imparts a reactional force - gravity.
If...