Heat conduction in gravity field without convection

This can be seen by the simplified formula for heat transport, which does not take into account gravity as a factor. However, there is some debate on whether gravity-induced corrections should be considered for technical purposes. It is possible to extend the formula to include gravity as a factor, but the determination of the factor is still uncertain. In summary, while gravity may have some effect on heat transport in a thermally isolated rod, it is not necessary to consider it for technical purposes and the factor for incorporating it into the formula is still undetermined.
  • #1
lukas.suess
1
0
I used to think that the heat does rise even in solid metals with no gas/liquid around
(No density argument is possible then.)
But couldn't find anything describing or even verifying it.
I'am pretty sure the gravitationally induced anharonicity in the atomic core potentials
should have at least a little effect.

The simplest description of heat transport in a thermally isolated rod is:
Power = diffTemp * ( thermConduct * Area /length)
My question would be wether it is necessary to consider gravity induced corrections
for technical purposes (9.81m/s**2) or not?

Could the formula be extended this way?
Power' = Power * (1 + inprod(e_rod, e_grav) * f)
and how could one determine the factor f?
 
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  • #2
For all practical purposes, gravity has no effect on heat conduction in a rod.
 

1. How does gravity affect heat conduction?

Gravity affects heat conduction by creating a force that pulls colder, denser materials down and warmer, less dense materials up. This can lead to a more uniform distribution of heat within a system, as the warmer materials are able to rise and transfer heat to the colder materials. However, gravity can also create convective currents that can disrupt the flow of heat, making it more difficult to accurately predict and control.

2. Can heat conduction occur in a vacuum without gravity?

Yes, heat conduction can still occur in a vacuum without the presence of gravity. This is because heat conduction is a process that is driven by temperature differences, not by the presence of a gravitational force. As long as there is a difference in temperature between two materials, heat will naturally flow from the warmer material to the cooler material.

3. How does the absence of convection affect heat conduction in a gravity field?

The absence of convection can actually improve the accuracy and predictability of heat conduction in a gravity field. Without convection, there are no convective currents to disrupt the flow of heat and create uneven temperature distributions. This allows for a more controlled and precise transfer of heat between materials. However, the effects of gravity on heat conduction must still be taken into account.

4. What factors can influence the rate of heat conduction in a gravity field without convection?

The rate of heat conduction in a gravity field without convection can be influenced by a variety of factors, such as the temperature difference between materials, the thermal conductivity of the materials, and the distance between the materials. Gravity can also play a role in the rate of heat conduction, as it can affect the density and movement of the materials involved.

5. How is heat conduction in a gravity field without convection studied and measured?

Heat conduction in a gravity field without convection can be studied and measured through experiments and simulations. Researchers can use controlled environments and precise measurements to study how different factors, such as temperature and distance, affect the rate of heat conduction. Computer simulations can also be used to model and predict the behavior of heat conduction in a gravity field without convection.

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