Science and Technology of Nuclear Installations

Review Article

Review of Available Data for Validation of Nuresim Two-Phase CFD Software Applied to CHF Investigations

Correspondence between the data sources relative to DNB investigations and the basic phenomena at the mesoscale.

α

: local void fraction,

A i

: local interfacial area density,

δ_{b}

: local average bubble diameter,

F_{δ}

: bubble size distribution,

V_{l z}

: axial mean liquid velovity,

v_{l z}^{'}

: rms axial liquid velovity,

V_{b z}

: axial mean bubble velovity,

T_{l}

: liquid temperature,

T_{w}

: wall temperature,

T_{w}^{'}

: rms value of wall temperature,

V_{l x}

: radial component of mean liquid velovity,

v_{l x}^{'}

: rms radial component of liquid velovity,

ϕ_{crit}

: critical heat flux.

	DEDALE	DEBORA	DEBORA Promoter	AGATE (&AGATE-promoter)	ASU	PURDUE boiling	KAERI boiling	TOPFLOW	BFBT	LWL


Geometry	Tube $L$ = 6 m $D$ = 0.0381 m	Tube $D$ = 0.0192 m	Tube + promoter	Rod bundle (tube +promoter)	Annulus $D i$ = 15.78 mm $D e$ = 38.02 m	Annulus $D i$ = 19.1 m $D e$ = 38.1 m	Annulus $D i$ = 19 mm $D e$ = 37.5 mm	Tube $D$ = 195.3 mm	Rod bundle	Rod bundle
Fluid/flow conditions	Air-water adiabatic	R12	R12	water	R113	Steam-water	Steam-water	Air-water and steam-water	Steam/ water	Steam/ water
Local measur-ements	$α$ , $A i$ , $δ_{b}$ , $F_{δ}$ , $V_{l z}$ , $v_{l z}^{'}$ , $V_{b z}$ at $Z / D = 8$ , 55 & 155	$α$ , $A i$ , $T_{l}$ , $T_{w}$ , $δ_{b}$ , $V_{b z}$ ,	$α$ , $A i$ , $T_{l}$ , $T_{w}$ , $δ_{b}$ , $V_{b z}$ ,	$V_{l z}$ , $v_{l z}^{'}$ $V_{l x}$ , $v_{l x}^{'}$	$α$ , $V_{l z}$ , $v_{l z}^{'}$ , $v_{l x}^{'}$ , $V_{b z}$ , $T_{w}$ , $T_{w}^{'}$ , turbulent heat fluxes	$α$ , $A i$ , $δ_{b}$ , $V_{b z}$ at $z / D = 52.6$ +visual observations	$α$ , $A i$ , $δ_{b}$ , $V_{l z^{}}$ , $V_{b z}$	$α$ , $δ_{b}$ , $V_{b z}$ , $F_{δ}$	$α$ $ϕ_{crit}$	$ϕ_{crit}$
Wall to fluid heat		X			X	X	X
Bubbles transport and dispersion	X	X			X	X	X	X
Vaporization-condensation		X			X	X	X	X
Coalescence and breakup of bubbles	X	X			X	X	X	X
Turbulent Transfers of heat and momentum	X	X	X	X	X	X	X	X
Effects of polydispersion		X						X
Effects of grids			X	X
Combined effects in real geometry									BWR	PWR WWER