Questions tagged [convection]
transport mechanism involving bulk motion of a medium
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Calculating temperature change out of a room [closed]
Currently I'm trying to find how the outside temperature affects the internal temperature of a room through its walls. I'm trying to use the convection heat transfer equation to find the exterior wall ...
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If I'm inside water, is the amount of heat energy I can receive capped because water can't go above 100°C?
I just learned about double-boiling, where instead of putting a pot directly on the flame stove (where it can get too hot), you put a big tub of water on the flame, and put the pot in the tub of water....
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The roles of convection and advection in the absolute flux for species $i$ in mass transfer
I am confused as I have been reading on mass transport on multiple sources and they seem to use "advection" and "convection" interchangeably in the equation for the absolute flux ...
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Lumped body analysis
$k$ - thermal conductivity,
$h$ - heat transfer coefficient,
$\rho C_p$ - Volumetric heat capacity,
$T$ - temperature
$T_\infty$ - Temperature of exposed cooling surrounding environment
Consider two ...
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At what circumstances is Nusselt's theory of evaporating falling films valid?
Nusselt's theory of evaporating falling films assumes no convection and neglects the effect of inertia. At what circumstances is that valid? Any books or articles that discuss this in depth would be ...
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Explain how convection is a type of heat transfer
So, from my understanding convection is when a gas or liquid is unevenly heated and the warmer portion rises, as it is less dense, and the cooler portion sinks creating a cycle(something along those ...
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How does the height of the hole on the bottle affect the burning time of the candles?
We took 3 identical bottles and drilled some holes on the side, each bottle had a hole but at different heights. Then we covered the burning candles with the 3 bottles and measured the burning time. ...
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Conduction in liquid and gas
Is this condition correct, "if liquid and gas heated from top, then it will be possible for 'conduction' to occur" ?
One reason i can think is :
when liquid or gas is heated from sideways or ...
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What creates the Global Dipole Magnetic Field in the Sun?
I understand that the Sun undergoes convection and with rotation, the convective cells have a helical motion because of the Coriolis Force. My confusion comes from the fact that via the right-hand ...
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How to measure actual conductive & convective losses inside an enclosed container?
I've been studying convection and come across empirically-derived formulas for calculating the Nusselt number for various geometries.
For my particular use case, I'd like to measure the actual ...
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How do I calculate the rate of heat loss from an enclosure when I have a plot of temperature vs time and the enclosure's material details? [closed]
I have an enclosure running an ON/ OFF temperature control system. The below graph shows internal air temperature over time. I have the raw data providing actual values.
I have the dimensions of the ...
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How to determine air flow required? [closed]
I am making a sound dampening box for a vacuum pump. It’s loud almost 96dB. I have an ultra quiet fan to vent heat out of the box. I want to calculate how to make a couple small inlet holes while ...
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Can land breezes be an example of perpetual motion?
Since perpetual motion refers to a never-ending motion with no external energy provided whatsoever, can land breezes or sea breezes be an example? Or perhaps even trade winds, since this, I believe, ...
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Rigorous definition of convective heat transfer
Through all textbooks I've come across, convective heat transfer is traditionally defined along the line of "[...] a process by which heat is transferred by movement of a heated fluid such as air ...
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Local and convective acceleration in 'water tank-pipe' systems
I found this elegant solution to the Euler equation when the classic 'water tank-pipe' system opens the valve - the initial unsteady flow "stabilizes" and the equation turns into the ...
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