What exactly is the difference between advection and convection?
After reading Wikipedia articles on advection and convection, I still cannot determine whether there is a consensus on a difference between these two terms. Sometimes, the term …
What is the exact difference between diffusion, convection and …
convection = diffusion + advection. That is, convection is the sum of fluid movement due to bulk transport of the media (like the water in a river flowing down a stream - advection) and the …
Diffusion vs Advection - Physics Stack Exchange
Apr 1, 2018 · Whereas advection is the transport of a substance by bulk motion;that is the movement of fluids down a pressure or temperature gradient. My confusion is that: when there …
Convective and Diffusive terms in Navier Stokes Equations
My question has 2 parts: I just followed the derivation of Navier Stokes (for Control Volume CFD analysis) and was able to understand most parts. However, the book I use (by Versteeg) does …
Advection equation of heat transfer during fluid flow in pipe with …
Sep 26, 2024 · I am trying to model transient temperature profile during fluid flow in pipe considering heat exchange with the surrounding. I am trying to use overall heat transfer …
Convection vs diffusion - Physics Stack Exchange
Oct 19, 2016 · Convection is a combination of advection and diffusion, where the former is a macroscopic movement of bulk fluid and the latter is a microscopic movement of fluid particles. …
Why is the momentum advection dependent on all 3 dimensions?
Apr 13, 2021 · For a 3D flow, the advection term in the x-momentum equation is $-\nabla \cdot (\rho u \vec {u})$. How does momentum flow in the y and z directions contribute to the …
Rate of Temperature Change due to Heat addition
I might be wrong but I will give a little background leading to my question. I am trying to calculate the heat generation in the advection-diffusion equation for heat generation due to friction by ...
fluid dynamics - How can I see this equation describes advection ...
Advection is the transport of some variable along a flow: $\partial_tq+\nabla\cdot (\mathbf {v}q)=0$. Faraday's law as given is an advection equation with a particular constraint that …
Derivation of the advection equation - Physics Stack Exchange
Oct 30, 2021 · In this Wikipedia article, specifically in the section "Mathematics of advection", the following general equation for advection is given as: \begin {equation} \dfrac {\partial\psi} …