nato asi conference, kyiv-20041 modeling and simulation of turbulent penetrative convection and...
TRANSCRIPT
NATO ASI Conference, Kyiv-2004 1
MODELING AND SIMULATION OF TURBULENT PENETRATIVE CONVECTION
AND POLLUTANT DISPERSION ABOVE THE URBAN HEAT ISLAND IN STABLY
STRATIFIED ENVIRONMENT
A.F. KurbatskiyInstitute of Theoretical and Applied Mechanics SB RAS
Novosibirsk State UniversityNovosibirsk, Russia
L.I. KurbatskayaInstitute of Computational Math. and Math. Geophysics SB RAS
Novosibirsk, Russia
NATO ASI Conference, Kyiv-2004 2
HEAT TRANSFER BOUNDARY CONDITIONS
At the plume axis and at its outer boundary
symmetric conditions
(/r) = (/r) = (/r) (2/r) = 0 are prescribed.
(Ur=0 at r = 0 and at r =1.8R)
At the top boundary
the zero-flux condition
V/z = /z = /z =
= 2/z = 0 is enforced.
Domain of integration
is a cylinder
rz
s o u r c e
Top boundary
Heat Flux, H0
NATO ASI Conference, Kyiv-2004 3
HEAT TRANSFER BOUNDARY CONDITIONS
The surface heat source is placed on the bottom (z = 0) has the size 0 r / D 0.5.
Boundary conditions at the bottom are specified as
heat flux H0 is prescribedvalues of E, and 2 at the first level above surface
are chosen according to Kurbatskii
(JAM, 2001, vol.40, No.10)
Domain of integration
is a cylinder
Z0
Top boundary
s o u r c e
Heat Flux, H0
r
NATO ASI Conference, Kyiv-2004 4
MASS TRANSFER BOUNDARY CONDITIONS
At the plume axis and at outer boundary,
(C/r) = (c/r) = 0.
At the top,
Constant flux of mass,
is prescribed inside a source.
At the bottom and outside of a source
Domain of integrationis a cylinder
Z
r
Top boundary
mass source
L = 0.5 D
.0// zczC
cHzCD )/(
,0 c.0/ zC
NATO ASI Conference, Kyiv-2004 5
MASS TRANSFER BOUNDARY CONDITIONS
The same boundary conditions are used for source of small length located at the center of a heat island.
Domain of integration
is a cylinder
Z
r
Top boundary
mass source
L=0.1D
NATO ASI Conference, Kyiv-2004 6
MASS TRANSFER BOUNDARY CONDITIONS
and the same boundary conditions are used for source of small length located at the periphery of a heat island.
Domain of integration
is a cylinder
Z
r
Top boundary
mass source
L= 0.1D