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Large eddy simulation of atmospheric...

The Johns Hopkins University.

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Large eddy simulation of atmospheric boundary layer flows and application to pollen dispersal.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Large eddy simulation of atmospheric boundary layer flows and application to pollen dispersal./
作者:	Chamecki, Marcelo.
面頁冊數:	187 p.
附註:	Advisers: Charles Meneveau; Marc Parlange.
Contained By:	Dissertation Abstracts International69-12B.
標題:	Atmospheric Sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3339688
ISBN:	9780549936527

Large eddy simulation of atmospheric boundary layer flows and application to pollen dispersal.
Chamecki, Marcelo.

Large eddy simulation of atmospheric boundary layer flows and application to pollen dispersal. - 187 p.

Advisers: Charles Meneveau; Marc Parlange.

Thesis (Ph.D.)--The Johns Hopkins University, 2009.

This work presents a framework for simulating pollen dispersal by wind based on Large Eddy Simulation. Important phenomena such as pollen emission by plants and ground deposition are modeled through the boundary condition. An expression for the vertical equilibrium concentration profile of pollen particles, including the effect of the canopy on the eddy diffusivity as well as corrections for atmospheric stability, is proposed for this purpose. This expression is validated against measurements of vertical concentration profiles of corn pollen above a corn field. The numerical discretization of the evolution equations follows a new approach in which different discretization schemes are used for the velocity and concentration fields. A new interpolation scheme is proposed to couple the two discretizations. The numerical model is validated against previously published experiments of point-source releases of glass beads and pollen grains in the atmospheric boundary layer. The numerical model is used together with experimental data of pollen emission and downwind deposition from a natural field obtained near Washington DC in the summer of 2006. The combined analysis of experimental and numerical data elucidates the emission, transport, and deposition processes in considerable detail. In particular, the relative fractions of pollen deposited inside the source field and airborne at the edge of the field can be quantified. Investigations based on experimental data and direct numerical simulation of the effects of the local structure of the flow on subgrid scale models for simulations of the atmospheric boundary layer are also presented.

ISBN: 9780549936527Subjects--Topical Terms:

1019179
Atmospheric Sciences.

Large eddy simulation of atmospheric boundary layer flows and application to pollen dispersal.
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100 1 $a Chamecki, Marcelo. $3 1019531
245 1 0 $a Large eddy simulation of atmospheric boundary layer flows and application to pollen dispersal.
300 $a 187 p.
500 $a Advisers: Charles Meneveau; Marc Parlange.
500 $a Source: Dissertation Abstracts International, Volume: 69-12, Section: B, page: 7361.
502 $a Thesis (Ph.D.)--The Johns Hopkins University, 2009.
520 $a This work presents a framework for simulating pollen dispersal by wind based on Large Eddy Simulation. Important phenomena such as pollen emission by plants and ground deposition are modeled through the boundary condition. An expression for the vertical equilibrium concentration profile of pollen particles, including the effect of the canopy on the eddy diffusivity as well as corrections for atmospheric stability, is proposed for this purpose. This expression is validated against measurements of vertical concentration profiles of corn pollen above a corn field. The numerical discretization of the evolution equations follows a new approach in which different discretization schemes are used for the velocity and concentration fields. A new interpolation scheme is proposed to couple the two discretizations. The numerical model is validated against previously published experiments of point-source releases of glass beads and pollen grains in the atmospheric boundary layer. The numerical model is used together with experimental data of pollen emission and downwind deposition from a natural field obtained near Washington DC in the summer of 2006. The combined analysis of experimental and numerical data elucidates the emission, transport, and deposition processes in considerable detail. In particular, the relative fractions of pollen deposited inside the source field and airborne at the edge of the field can be quantified. Investigations based on experimental data and direct numerical simulation of the effects of the local structure of the flow on subgrid scale models for simulations of the atmospheric boundary layer are also presented.
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710 2 $a The Johns Hopkins University. $3 1017431
773 0 $t Dissertation Abstracts International $g 69-12B.
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790 1 0 $a Parlange, Marc, $e advisor
791 $a Ph.D.
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856 4 0 $u http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3339688