Fluid mechanics Diffusion, convection and porous media Concept
Advection–diffusion equation
Summary
The advection–diffusion equation, also called the convection–diffusion equation, describes a quantity carried by a flow that also spreads by diffusion. Examples are a dye concentration and a temperature. It combines the transport equation with the heat equation. It is the basic model of the transport of heat and of dissolved substances in fluids. The relative strength of the two effects is measured by the Péclet number.
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| Tag | DG49VBBT91 |
|---|---|
| URI | m2://DG49VBBT91 |
| Kind | concept |
| Writing | W0 stub |
| MSC | 76R50, 35Q35 |
| Same as | |
| Changed | 3 November 2026 |
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