Description

This model uses

• d2q7 cumulant collision kernel for hydrodynamics
• d2q7 cumulant or cascaded collision kernel for heat
• Boussinesq approx to couple heat with hydrodynamics

It is a 2d version od d3q27q27_cm_cht

BC

• periodic
• Dirichlet - Equilibrium scheme (1st order convergence)
• Dirichlet - Anti Bounce Back (2nd order convergence)
• Dirichlet - Interpolated Anti Bounce Back (2nd order convergence)

• Neumann like bc - impose heat flux

• WVelocity inlet

• EPressure Outlet
• Neumann Outlet
• Convective Outlet

Details

Model description files files for this model: Dynamics.c Dynamics.R

Zonal Settings

Name	Comment
VelocityX	inlet/outlet/init x-velocity component
VelocityY	inlet/outlet/init y-velocity component
Pressure	inlet/outlet/init pressure
InitTemperature	Initial/Inflow temperature distribution
InitHeatFlux	Initial/Inflow heat flux through boundary
conductivity	thermal conductivity of fluid (W/(m·K))
material_density	density of material [kg/m3]
cp	specific heat capacity at constant pressure of fluid (J/(kg·K))
Sigma_GH	Initial width of the Gaussian Hill
FDragInObj	Weight of [Force exerted on body in X-direction] in objective
FLiftInObj	Weight of [Force exerted on body in Y-direction] in objective
XHydroFLuxInObj	Weight of [Momentum flux in X-direction] in objective
YHydroFLuxInObj	Weight of [Momentum flux in Y-direction] in objective
XHydroFLux2InObj	Weight of [Momentum flux (2nd logger) in X-direction] in objective
YHydroFLux2InObj	Weight of [Momentum flux (2nd logger) in Y-direction] in objective
HeatFluxXInObj	Weight of [Heat flux in X-direction] in objective
HeatFluxYInObj	Weight of [Heat flux in Y-direction] in objective
HeatFluxX2InObj	Weight of [Heat flux (2nd logger) in X-direction] in objective
HeatFluxY2InObj	Weight of [Heat flux (2nd logger) in Y-direction] in objective
HeatSourceInObj	Weight of [Total Heat flux from body] in objective

Global Settings

Name	Derived	Comment
GravitationX		applied rho*GravitationX
GravitationY		applied rho*GravitationY
nu		kinematic viscosity
GalileanCorrection		Galilean correction term
nu_buffer		kinematic viscosity in the buffer layer
conductivity_buffer		thermal conductivity in the buffer layer
Omegafor3rdCumulants		relaxation rate for 3rd order cumulants
h_stability_enhancement		magic stability enhancement
BoussinesqCoeff		BoussinesqCoeff=rho_0*thermal_exp_coeff
CylinderCenterX		X coord of cylinder with imposed heat flux
CylinderCenterY		Y coord of cylinder with imposed heat flux
CylinderCenterX_GH		X coord of Gaussian Hill
CylinderCenterY_GH		Y coord of Gaussian Hill
Smag		Smagorinsky coefficient for SGS modeling
Threshold		Parameters threshold

Exported Quantities (VTK, etc)

Name	Unit	Comment
Rho	kg/m3	Rho
U	m/s	U
H	J	H
T	K	T
m00_F	1	m00_F
material_density	kg/m3	material_density
cp	J/kg/K	cp
conductivity	W/m/K	conductivity
RawU	m/s	RawU
KinE	1	Turbulent kinetic energy
ReStr	1	Reynolds stress off-diagonal component
Dissipation	1	Dissipation e
averageU	m/s	averageU
varU	1	varU
averageP	Pa	averageP
averageT	K	averageT

Exported Global Integrals (CSV, etc)

Name	Unit	Comment
FDrag	N	Force exerted on body in X-direction
FLift	N	Force exerted on body in Y-direction
XHydroFLux	kg/s	Momentum flux in X-direction
YHydroFLux	kg/s	Momentum flux in Y-direction
XHydroFLux2	kg/s	Momentum flux (2nd logger) in X-direction
YHydroFLux2	kg/s	Momentum flux (2nd logger) in Y-direction
HeatFluxX	W	Heat flux in X-direction
HeatFluxY	W	Heat flux in Y-direction
HeatFluxX2	W	Heat flux (2nd logger) in X-direction
HeatFluxY2	W	Heat flux (2nd logger) in Y-direction
HeatSource	W	Total Heat flux from body
Objective	1	Objective function

Node Types

Group	Types
ADDITIONALS	DarcySolid, Smoothing
ADDITIONALS_HEAT	HeaterDirichletTemperatureEQ, HeaterDirichletTemperatureABB, HeaterSource, HeaterNeumannHeatFluxCylinder, HeaterNeumannHeatFluxEast
BODY	Body
BOUNDARY	EPressure, Solid, Wall, WVelocity
COLLISION	CM, CM_HIGHER, CM_HIGHER_NONLINEAR, Cumulants
OBJECTIVEFLUX	FluxMeasurmentZone1, FluxMeasurmentZone2
OBJECTIVEFORCE	ForceMeasurmentZone
SETTINGZONE	DefaultZone

Solved fields

Name	Access pattern	Comment
f000		flow LB density F 0
f100		flow LB density F 1
f200		flow LB density F 2
f010		flow LB density F 3
f110		flow LB density F 4
f210		flow LB density F 5
f020		flow LB density F 6
f120		flow LB density F 7
f220		flow LB density F 8
h000		heat LB density H 1
h100		heat LB density H 2
h200		heat LB density H 3
h010		heat LB density H 4
h110		heat LB density H 5
h210		heat LB density H 6
h020		heat LB density H 7
h120		heat LB density H 8
h220		heat LB density H 9
U		U
avgT		avgT
avgP		avgP
varUX		varUX
varUY		varUY
varUXUY		varUXUY
avgdxu2		avgdxu2
avgdyv2		avgdyv2
avgUX		avgUX
avgUY		avgUY

Densities - default accessors

Name	Field	Pulling field from	Comment
f000	f000		flow LB density F 0
f100	f100		flow LB density F 1
f200	f200		flow LB density F 2
f010	f010		flow LB density F 3
f110	f110		flow LB density F 4
f210	f210		flow LB density F 5
f020	f020		flow LB density F 6
f120	f120		flow LB density F 7
f220	f220		flow LB density F 8
h000	h000		heat LB density H 1
h100	h100		heat LB density H 2
h200	h200		heat LB density H 3
h010	h010		heat LB density H 4
h110	h110		heat LB density H 5
h210	h210		heat LB density H 6
h020	h020		heat LB density H 7
h120	h120		heat LB density H 8
h220	h220		heat LB density H 9
U	U		U
avgT	avgT		avgT
avgP	avgP		avgP
varUX	varUX		varUX
varUY	varUY		varUY
varUXUY	varUXUY		varUXUY
avgdxu2	avgdxu2		avgdxu2
avgdyv2	avgdyv2		avgdyv2
avgUX	avgUX		avgUX
avgUY	avgUY		avgUY

Action stages

Name	Main procedure	Preloaded densities	Pushed fields
BaseIteration	Run	f000, f100, f200, f010, f110, f210, f020, f120, f220, h000, h100, h200, h010, h110, h210, h020, h120, h220, U, avgT, avgP, varUX, varUY, varUXUY, avgdxu2, avgdyv2, avgUX, avgUY	f000, f100, f200, f010, f110, f210, f020, f120, f220, h000, h100, h200, h010, h110, h210, h020, h120, h220, U, avgT, avgP, varUX, varUY, varUXUY, avgdxu2, avgdyv2, avgUX, avgUY
BaseInit	Init	none	f000, f100, f200, f010, f110, f210, f020, f120, f220, h000, h100, h200, h010, h110, h210, h020, h120, h220, U, avgT, avgP, varUX, varUY, varUXUY, avgdxu2, avgdyv2, avgUX, avgUY

Actions

Name	Stages
Iteration	BaseIteration
Init	BaseInit