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 …
homework and exercises - Advection operator - Physics Stack …
Jan 20, 2015 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What's reputation …
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 …
fluid dynamics - Are characteristics the only solution to the …
Nov 9, 2018 · Are characteristics the only solution to the advection equation in 1+1D? Ask Question Asked 6 years, 11 months ago Modified 6 years, 11 months ago
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 ...
What does it mean when a flow is non-conservative?
Jan 3, 2022 · From a physical point of view (not numerical), does a non-conservative flow have any meaning? I'm solving this scalar advection-diffusion equation with source and sink terms. I …
9-point stencil “equivalent” for advection equation
Jul 24, 2015 · The 9 point stencil adds spatially "diagonal" components to the discretization. However, the advection part still has some pretty bad grid orientation problems. I was …