mattbilson76

Thanks. I think it is connected to the fire plume. I looked in Section 6.5 of the validation guide and there are some vertical velocity profiles in there. I suspect...

I tested some very simple models of a pool fire and found that with a finer grid. The finer grid case tended to get an increased vertical centerline velocity. Attached...

It has quite an impact then, for such a small amount of heat. Have you looked at the momentum flux at all? That might be a bigger differential. I took...

Yes, the animations show the change in plume structure very well. The plume seems to be the critical thing here, though I am still not quite sure what the path...

Hi Randy, I agree, that should show us something. I posted a little while back about the McCaffrey plume predictions on the centerline, and was getting results trending toward a...

Fundamentally the same result then with just the thermal plume. I have been looking at ceiling jets a bit here. I found that a simulation over predicted the jet maximum...

I ran a case modeling the horizontal ceiling jet. Image below, three different grids. The maximum plume velocity is typically more than the correlation. There is some sensitivity to the...

Hi Randy - I used a time average statistic on a grid of points...like this: &DEVC XBP=0.00,0.00,0.0,0.0,1.5,2.0,QUANTITY='U-VELOCITY',ID='velP-01',POINTS=20,STATISTICS_START=30.0,STATISTICS_END=260.0 / Files are attached. [PX-1-6.fds.txt](https://github.com/firemodels/fds/files/10962402/PX-1-6.fds.txt) [PX-1-7.fds.txt](https://github.com/firemodels/fds/files/10962403/PX-1-7.fds.txt) [PX-1-5.fds.txt](https://github.com/firemodels/fds/files/10962404/PX-1-5.fds.txt)

HI - I am wondering if this issue is tied to the pressure equation and tolerances. Per the User Guide there is the pressure tolerance that has a default of...

Tested this (pressure tolerance) on a few cases, but did not see anything of significance. I circled back to the wall functions. The wall shear stress decreases as the grid...