Numerical-assisted design of a wind tunnel used in the estimation of volatilization from water, waste or soil.
Numerical simulations of the flow inside two wind tunnel geometries used for determining emission volatilization have been conducted. The flow pattern was examined in a plane close to the emitting surface. A reduced surface, characterizing the low velocity zones in this plane, has been defined. The proposed geometry modification, consisting of a convergent/divergent system, decreases the low velocity regions by a factor ranging between 2 and 3.5. Large vortices present in the conventional configuration are almost eliminated. The new velocity distribution, close to the emitting surface, is more uniform and should therefore generate a more efficient mass transfer to the flowing air.
Ecole des Mines de Nantes, UMR CNRS 6144, GEPEA 4 rue Alfred Kastler, BP 20722, 44307 Nantes, France.
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D000393:Air Pollutants / Q000032:analysis*; D002138:Calibration; D004784:Environmental Monitoring / Q000379:methods; D007700:Kinetics; D008962:Models, Theoretical; D009812:Odorants / Q000032:analysis*; D014835:Volatilization; D014919:Wind
D000393:Air Pollutants