# Questions tagged [transport-phenomena]

Transport phenomenon are mechanisms by which particles or quantities move from one place to another. For example, this could be electrical transport (where electrical charge moves), thermal transport (where thermal energy moves), or molecular diffusion (where mass moves).

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### An Exotic Transport Phenomena with Zero-Current at Different Voltage Values

I am a researcher working with active matters, and in one of my experiment I've seen a very exotic transport phenomena which we obtain zero-current for many different values of voltage (those values ...
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### Microscopic mechanical energy conservation equation derivation

The transport phenomena book by Bird states that the mechanical energy equation can be derived by taking the dot product of the momentum conservation equation with the velocity vector v. This is the ...
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### What is the difference between 'Equation of motion' and 'Transport equation'?

I think this is a simple question with a not so easily explained answer. What is the difference between the Equation of motion and Transport eq? Is Navier stokes equation an 'Equation of motion' or a '...
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### Electron transport in fluids VS solids ("structure factor" VS "phonons")

Assume to have a neutral plasma consisting of some ions $X^+$ in a neutralizing gas of electrons $e^-$. Imagine that the $X^+$ can be in a gaseous (G), liquid (L) or solid (S) phase. We want to ...
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### Small parameter expansion to obtain convective heat transfer solution of the heat equation

I'm trying to follow along with this paper on perturbative transport analysis. The section I'm stuck on analyzes the heat equation in 1D slab geometry. To get a diffusion-only solution is relatively ...
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### Molecular explanation for pressure

According to this post, viscous stress is the result of molecular diffusion. More specifically, it's a transfer of momentum in a direction perpendicular to the direction of a velocity gradient. This ...