Detailed CFD Modelling of Open Refrigerated Display Cabinets

Table 7

DAG and RAG porous medium parameters.

Grille	Parameters	Variable/expression	Unit	Value
RAG	Pressure loss	Δp (experimental value)	Pa	2.30
	Porosity	𝜀=𝑉𝑣/𝑉𝑡	—	0.51
	Permeability	𝑘=𝜀𝐷^2ℎ/12	m^2	4.24 × 10^−6
	Loss coefficient	𝐾=2Δ𝑝/𝜌𝑣^2	—	1.33
	Inertial resist. coef.	𝐶2=(𝐾/𝛿)(1/𝜀)^2	m^−1	5.34 × 10^3
DAG	Pressure loss	Δp (experimental value)	Pa	0.30
	Porosity	𝜀=𝑉𝑣/𝑉𝑡	—	0.72
	Permeability	𝑘=𝜀𝐷^2ℎ/32=𝜀⋅(4⋅(3√3𝐷^2comb/8)/6𝑟)^2/32	m^2	2.76 × 10^−7
	Loss coefficient	[50]	—	2.67
	Inertial resist. coef.	𝐶2=(𝐾/𝛿)(1/𝜀)^2	m^−1	2.15 × 10^2