Step 5: Cell Zone Conditions

Cell Zone Conditions

1.   Set the cell zone conditions for the fluid ( fluid).

Cell Zone Conditions fluid Edit...

(a)   Select nitrogen from the Material Name drop-down list.

(b)   Click OK to close the Fluid dialog box.

2.   Set the cell zone conditions for the substrate ( substrate).

Cell Zone Conditions substrate Edit...

(a)   Select nitrogen from the Material Name drop-down list.

(b)   Enable Porous Zone to activate the porous zone model.

(c)   Enable Laminar Zone to solve the flow in the porous zone without turbulence.

(d)   Click the Porous Zone tab.

i.   Make sure that the principal direction vectors are set as shown in Table  8.1.

   ANSYS FLUENT automatically calculates the third (z-direction) vector based on your inputs for the first two vectors. The direction vectors determine which axis the viscous and internal resistance coefficients act upon.

Table 8.1: Values for the Principle Direction Vectors

Axis	Direction-1 Vector	Direction-2 Vector
X	1	0
Y	0	1
Z	0	0

  Use the scroll bar to access the fields that are not initially visible in the dialog box.

ii.   Enter the values in Table  8.2 for the Viscous Resistance and Inertial Resistance.

   Direction-2 and Direction-3 are set to arbitrary large numbers. These values are several orders of magnitude greater than that of Direction-1 flow and will make any radial flow insignificant.

  Scroll down to access the fields that are not initially visible in the panel.

Table 8.2: Values for the Viscous and Inertial Resistance

Direction	Viscous Resistance	Inertial Resistance
	(1/m2)	(1/m)
Direction-1	3.846e+07	20.414
Direction-2	3.846e+10	20414
Direction-3	3.846e+10	20414

(e)   Click OK to close the Fluid dialog box.