I was looking at some data from my weather station from past summer thunderstorms, and I remembered one interesting storm from a few years ago. The outflow boundary winds actually increased the local temperature by about 3-4 degrees before the main storm arrived and there was the typical rapid cooling. My data is below.
From what I understand, outflow boundary winds typically cause a rapid decrease in temperature, but not in this case. I also checked other local weather stations on wunderground, and they all show the same increase as my data.
I don't think this was a heat burst, as the temperature rise was only 3-4 degrees, and the storm was quite strong, not decaying.
Any ideas of what could cause the short term temperature increase?
https://preview.redd.it/3katl5nrga871.png?width=899&format=png&auto=webp&s=504a7c105acf3782cd2b0ea3a1137914a715237a
Hi all,
I am running supersonic and hypersonic simulations. For most of my simulations, the initial conditions are set by Rankine-Hugoniot conditions to simulate a moving shock towards the geometry. For some cases, it seems extrapolation boundary conditions are sufficient for the inflow/outflow boundaries. However, there are a few cases where these don't seem to be working. I must add supersonic inflow/outflow boundary conditions to my code. Does anyone have any resources that explains their implementation clearly (I Do Like CFD is a great resource usually but I could not find this there). In my code, I am usually specifying the density, pressure, and velocities.
Appreciate any guidance!
I was simulating a bluff body simulation in a very confined region on FLUENT, and was getting reverse flow when i gave a pressure outlet at the exit but the reverse flow became alternating or almost reduced when i gave outflow condition at the exit.
What is the basic difference between the two?
