heat transfer 1 min read
Combined Convection and Radiation
Since these two modes of heat transfer are completely independent, there would be no mutual effect between them. Thus net…
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Analogy between Heat Transfer and Electric Circuits
There exists an analogy between the diffusion of heat and electrical charge. Just as an electrical resistance is associated with…
heat transfer 2 min read
Radiation Heat Transfer (Heat transfer by thermal radiation)
All bodies radiate energy in the form of photons moving in a random direction, with random phase and frequency. When…
heat transfer 2 min read
Heat Exchangers
The general function of a heat exchanger is to transfer heat from one fluid to another. The basic component of…
heat transfer 1 min read
Some Considerations in Modeling Complex Physical Processes
In Sections 5 and 6, a number of assumptions were made about the processes that we were attempting to describe.…
heat transfer 2 min read
Transient Heat Transfer (Convective Cooling or Heating)
All the heat transfer problems we have examined have been steady state, but there are often circumstances in which the…
heat transfer 2 min read
Heat Transfer From a Fin
Fins are used in a large number of applications to increase the heat transfer from surfaces. Typically, the fin material…
heat transfer 1 min read
Temperature Distributions in the Presence of Heat Sources
There are a number of situations in which there are sources of heat in the domain of interest. Examples are:…
heat transfer 2 min read
Thermal Conductivity, k
As noted previously, thermal conductivity is a thermodynamic property of a material. From the State Postulate given in thermodynamics, it may be recalled that thermodynamic properties of pure substances are functions …
heat transfer 2 min read
Heat Transfer: Radiation
So we’ve learned that conduction moves heat easiest through solids, and convection moves heat through liquids and gases. So how…
heat transfer 2 min read
Heat Transfer: Convection
Convection is how heat passes through fluids. A fluid is anything that has loosely moving molecules that can move easily…
heat transfer 2 min read
Heat Transfer: Conduction
We have learned that heat is the energy that makes molecules move. Molecules with more heat energy move faster, and…