Large Eddy Simulation of Humaninduced Contaminant Transports

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1 204 Yose Cv Egeerg Large Ey Smato of Hmace Cotamat Trasports Jg- Cho Dept. of Comptatoa Scece & Egeerg Yose Uversty Jack R. Ewars Dept. Mechaca & Aerospace Egeerg North Caroa State Uversty

Motvatos Cotamat Trasports oor Evromets Desg of cea room Desg of CU Negatve

arock operatos www.mscha.e/abc_schtz/copro.htm Ateroom Ar Crta http://www.

asp Arock Mtzoe Moeg or CFD Statc evromets wth HVAC systems Chaegg sses Trackg

2 Motvatos Cotamat Trasports oor Evromets Desg of cea room Desg of CU Negatve pressre ffereta Coectve Protecto Systems Desg of gress/egress ts Optmzato of arock operatos Ateroom Ar Crta Arock Mtzoe Moeg or CFD Statc evromets wth HVAC systems Chaegg sses Trackg of expecte a se reease of CB agets / fectos sease cotro Traset factors; gress/egress Hma/oor motos

3 Objectves Protectos of oor evromets mme bg / Coectve Protecto CoPro systems Arocks To protect bg occpats from bochemca warfare aget attacks a from toxc materas reease after stra accets Traset factors: moto of persoe a oors other forms of etry vet system actvty etc. Smato of tme-epeet cotamat trasports wth room compartmets as case by hma moto a other factors Deveopmet of methooogy for compcate appcatos etworks of rooms vetato systems opeg /cosg oors compcate hma moto etc. mmerse Boary Metho Use of etae smatos to eveop mprove zoa moes e.g. CONTAM for cotamat trasport Uerstag of comprehesve cotamat trasport mechasms

4 mmerse Boary Metho Basc formato rect forcg Ce cassfcatos Heavse fcto G Sge stace fcto Fe pots G=0 >0 Ba pots G= >0 teror pots G= 0 Fe pots mmerse boy srface teror pots Fe pots Ba pots teror pots Cho et a Jora of Comptatoa Physcs

5 mmerse Boary Metho Goverg eqatos rect forcg Cotty eqato Mometm eqatos Cotamat trasports passve gaseos cotamats SGS ey vscosty: Smagorsky moe Preservg mass coservato of cotamat trasports e to movg objects: tracer mass swept to or remove from a ce. 0 2 t p p G x G R B j j c t G x p t G R B j j j j G: Heavse fcto : Sge stace fcto 0 j k j k j k v x t

6 mmerse Boary Metho Recostrcto terpoatos ear B srfaces Veocty terpoato Power aw for tageta veocty Pressre terpoato terpoato pot s N T B k T T T T k N N N N B B B p B p p x s x x mmerse boy x k terpoato stec x x k : Weght base o mert fcto verse of projecto stace

7 mmerse Boary Metho Srface etfcatos & Sge Dstace Fcto CAD-base srface reerg of mmerse objects Stereothography STL fe format Three vertces wth otwar-potg orma vectors for each eemet Dstace cacato a srface etfcato Cacato of stace from a gve fe pot to the earest srface pot OM og N agorthm Arya et a.988 Cacato of sge stace fcto sg the ot proct of the stace vector wth otwar age weghte pseo-orma vector Bæretze & Aaæs 2005 The zero so-srface of the sge stace fcto s the boy srface as represete o the fe gr Age-weghte pseo-orma vector

8 Reastc Hma Wakg Moto Hma moe + Bastc wakg moto Mocho & McMaho 982 Hma srface Skeeto moe Hma reerg STL fes for ocomoto the preset comptato.

9 Cotamat Trasports Room Compartmets Probem specfcato Schematc agram: three-compartmet test rg Drty room Cea room Vestbe Exhast port Probem parameters Hma objects: 58 ta a 23 we a 3 epth at chest. \ Wakg veocty V=.25 m/sec assme cacatos ta coto: 0 ppm SF 6 rty room Doors are opee a cose as ma waks from rty to cea rooms Vet ocate ceter of vestbe 20 cbc feet / mte otfow Vet actvty for 60 s betwee wakg evets Cho & Ewars 20 oor Ar

10 Cotamat Trasports Room Compartmets Evoto of SF6 cocetratos

11 Cotamat Trasports Room Compartmets Tme-epeet SF6 mass cocetrato for perso wakg evet

Cotamat Trasports Room Compartmets Fve ma wakg/remova evets Tme-epeet mass parttog Ma Per-Perso mass trasport Sma vestbe Large vestbe cf DV cf VC cf DC cf DV cf VC

3 5.40 40.9 25.9 4.23 The et effect of creasg vome of the vestbe s to rece the cotamat trasport. ~20% recto for.

12 Cotamat Trasports Room Compartmets Fve ma wakg/remova evets Tme-epeet mass parttog Ma Per-Perso mass trasport Sma vestbe Large vestbe cf DV cf VC cf DC cf DV cf VC cf DC Mea The et effect of creasg vome of the vestbe s to rece the cotamat trasport. ~20% recto for.7 tmes arger vestbe Vet actvtes remova evets crease cocetratos vestbe e to the etramet from the gap beeath the frst oor. Drg the fve-perso wakg evets mass trasporte to the cea room s ~4% of ta mass the cotamate room.

13 Cotamat Trasports Room Compartmets Sestvty aayss Categorze mass trasports rty to cea room 30+ cases of sge perso wakg evets Door type sg vs swgg Wakg spee Door opeg rate Wakg patter stop/start vs cotos ta pressre ffereta 0 to 20 pa Swgg oor wake trasport s the omat effect Net trasport e to hma wake moto aoe s ~.8 cf a ~.3 cf for sg a swgg oor respectvey.

14 Cotamat Trasports Room Compartmets Mt-perso wakg evet Mass parttog Each ma trasports approxmatey the same amot of matera to the cea room

15 Cocsos Geera featres Large-ey smato/mmerse boary metho for cotamat trasport er hma actvtes has bee eveope. Cotamat trasport room compartmets arock Effect of vestbe sze Eargg the vestbe sze ca rece the cotamat trasport. e.g. ~20% recto for.7 tmes arger vestbe the preset cofgrato Effects of oor type sg verss swgg wakg spee a ta pressre ffereta o cotamat trasport. Swgg-oor moto ces p to sx tmes the amot of compartmet-tocompartmet trasport tha sg oor moto. The hma wake effect cotrbtes abot 67% of the tota amot trasporte for sg oors whe ths vae ecreases to abot 32% for swg-oors Effect of mt-perso wakg evet Each ma trasports approxmatey the same amot of matera after a we-mxe state s reache.

16 Ackowegemets Defese Avace Research Projecto Agecy DARPA Project Maager: R. Gbbs NCSU HPC Dvso Lx cster access prove by North Caroa State Uversty s Hgh Performace Comptg vso Wor Cass Uversty Program by Korea NRF Thak yo!

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