245 - FDS input file ASMR in forest

plume_rise_1.fds from the FDS Validation Guide (by NIST)

&HEAD CHID='plume_rise_1',  TITLE='Test plume rise height in stable atmosphere' /

&MESH IJK=50,52,50, XB=-50.,50.,-52.,52.,0.,100., MULT_ID='mesh1' /
&MULT ID='mesh1', DZ=100., K_UPPER=1 /
&MESH IJK=50,52,50, XB= 50.,250.,-104.,104.,0.,200., MULT_ID='mesh2' /
&MULT ID='mesh2', DZ=200., K_UPPER=1 /
&MESH IJK=50,50,50, XB=250.,650.,-200.,200.,0.,400., MULT_ID='mesh3' /
&MULT ID='mesh3', DX=400., DZ=400., I_UPPER=3, K_UPPER=1 /

&TIME T_END=900. /

&MISC TMPA=20.36 /

&WIND SPEED=5., LAPSE_RATE=-0.0048 /

&SPEC ID='SULFUR DIOXIDE' /

&VENT MB='XMIN', SURF_ID='OPEN' /
&VENT MB='XMAX', SURF_ID='OPEN' /
&VENT MB='YMIN', SURF_ID='OPEN' /
&VENT MB='YMAX', SURF_ID='OPEN' /
&VENT MB='ZMAX', SURF_ID='OPEN' /

&PART ID='TRACERS', MASSLESS=.TRUE., SAMPLING_FACTOR=1 /

&SURF ID='TOP', TMP_FRONT=200., MASS_FLUX(1)=0.01563, SPEC_ID(1)='SULFUR DIOXIDE', MASS_FLUX(2)=18.85, SPEC_ID(2)='AIR', COLOR='BLACK', PART_ID='TRACERS' /

&OBST XB=-2.0,2.0,-2.0,2.0, 0,75, SURF_IDS='TOP','INERT','INERT' /

&SLCF PBY=0, QUANTITY='VELOCITY', VECTOR=.TRUE. /
&SLCF PBY=0, QUANTITY='TEMPERATURE' /
&SLCF PBY=0, QUANTITY='DENSITY' /
&SLCF PBY=0, QUANTITY='MASS FRACTION', SPEC_ID='SULFUR DIOXIDE' /

&DEVC ID='z_CL', QUANTITY='MASS FRACTION', SPEC_ID='SULFUR DIOXIDE', XB=1800,1850,-200,200,0,800, SPATIAL_STATISTIC='MAXLOC Z' /

&TAIL /

Thank you NIST for providing an endless source of ASMR scripts on your github here: https://github.com/firemodels/fds/tree/master/Validation

I recommend everyone to go through this rich resource.

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Transcript

A New Format For Calm

Speaker 0:00

Hello everybody. Welcome to the Fire Science Show. So we have decided to shift the format a little bit. Everyone knows so much about fire science already, And I think while a lot of people enjoy this, what we need now in community is to get some relaxation and get some calm in our stressed lives as fire safety engineer. Therefore, introducing new approach to the podcast instead of bringing you interviews from leading fire safety engineers and researchers. I will be instead providing a source of relaxation, meditation, and calm. From now on in this podcast, we will be providing a SMR readings of FDS case files. In this first episode of the new format, we start with validation case wise for atmospheric dispersion FDS input file, plum rise one. Okay, let's start with this head, CHID, plum Rice one title test. Plum Rice, hide in stable atmosphere. Mesh IJK 50 52. 50 xb. Minus 50 50 minus 52. 52 0 100. Mult ID mesh one mult ID mesh one. These at equals hundred K upper equals one mesh IJK 50 52 50. XP 5,250 minus a hundred and four, a hundred and four zero two hundred. Malt ID mesh two malt ID Mesh two dsat equals 200 K upper equals one mesh IJK 50 50. 50 XB 250. 650 minus 200, 200 0 400. Mult ID mesh. Three mult ID Mesh three DX equals 400 D set equals 400 I upper equals three K upper equals one time T end. Equals 900 This concludes the mesh part. Let's pause here for a second. I hope you imagine yourself being in this huge outdoor domain about to observe. A plume rising in the atmosphere. Let's continue with the reading into the specification of operating conditions and boundary conditions. The. mis TMPA equals 20.36. Wind speed equals five. Lapse rate equals minus 0 0 0 48. Spec ID. Sulfur dioxide. VENT MB equals X-Men surf ID Open vent MB Xbox Surf id open vent mb. Y min surf ID open vent MB Y max surf id open vent MB Z max Surf ID Open part ID traces MASSLESS equals true sampling factor equals one. Serve Id. Top TMP front equals 200 mass flux one equals 0.0156. Three. Pets ID one equals sulfur dioxide, mass flux, two equals. 18 point 85 SPS ID two equals error color black PERT ID Traces Ops XB minus two two minus 2 2 0 75. Serve IDs top in it. so we have just created a domain that's predominantly open, as the case file suggests, the plum rise will be in an open atmosphere. I hope you feel the space that surrounds you through the open boundary conditions. We're about to release some sulfur dioxide, but you'll be able to observe its turbulent mixing with calm. Now the last thing to define are our diagnostics. Let's do this. S-L-C-F-P-B-Y equals zero quantity velocity vector true S-L-C-F-P-B-Y zero. Quantity. Temperature S-L-C-F-P-B-Y zero. Quantity density. SLCF. PPY zero, quantity, mass fraction pets id, sulfur dioxide, device id, Z underscore cl, quantity, mass fraction PET id, silver dioxide, xb. One thousand eight hundred one thousand eight hundred fifty minus 200. 200 0 800. Spatial statistic max lock Z tail. This concludes the. Test plum rise height in stable atmosphere case file. I hope you've enjoyed this and if you are still, he I have no idea what you are doing but I appreciate that, I guess. Uh, And yeah. And if you have came here to find some fire science and you have found none, I think if you just listen to a very interesting case file of, uh, plum rise of sulfur dioxide in atmosphere. Actually, it's good. This could be fun to run as I've was reading through it. Uh. You have not found fire science right now, but I promise you will find some very, very soon. Enjoy your day, stay calm, be mindfulness, and uh, yeah. Come back to fire science show. Cheers. Bye.