7.17.1.20.49. Porous_Decomposition

Syntax

Source For Energy ([{of} SpeciesName] | [{in} MaterialPhaseName] | [{ls} {a | b | c}]) {@ | at | for | on | over} MeshPartIdentifier = Porous_Decomposition ([Power_Output = power_output] | [Toggle = toggle] | E = e | A = a | Rho = rho | Delta_H = delta_h | Coef = coef | Pexp = pexp | R = r | Pref = Pref | Tref = Tref | Type = type)

Summary

Porous decomposition source for energy equation

Description

$S = \Delta H \rho Y_\text{eff} A \exp{\frac{-E}{R (T + T_\text{ref})}} \left(\frac{P}{P_\text{ref}}\right)^P_\text{exp}$

where $\Delta H$ , $\rho$ , $A$ , $E$ , $R$ , $T_\text{ref}$ , $P_\text{ref}$ , and $P_\text{exp}$ are the specified model parameters, $T$ is the temperature, $P$ is the pressure, and $Y_\text{eff}$ has multiple forms depending on the “type” parameter provided:

$Y_\text{eff} = \begin{cases} (1 - C + 0.01) \sqrt{-log{1-C + 0.01}}, &\text{type} = 1 \\ (1 - C + 0.01) \left(-log{1-C + 0.01}\right)^\frac{2}{3}, &\text{type} = 2 \\ (1 - C + 0.01) \left(-log{1-C + 0.01}\right)^\frac{3}{4}, &\text{type} = 3 \\ (1 - C + 0.01) \left(-log{1-C + 0.01}\right)^\frac{2}{3}, &\text{type} = 4 \\ (1-C+0.01)^\frac{2}{3}, &\text{type} = 5 \\ \sqrt{1-C+0.01}, &\text{type} = 6 \\ 1, &\text{type} = 7 \\ 1-C+0.01, &\text{type} = 8 \\ (1-C+0.01)^2, &\text{type} = 9 \\ (1-C+0.01)^3, &\text{type} = 10 \\ \frac{1}{C}, &\text{type} = 11 \\ \frac{1}{-\log{1-C+0.02}}, &\text{type} = 12 \\ \frac{(1-C+0.02)^\frac{2}{3}}{1-(1-C+0.02)^\frac{1}{3}}, &\text{type} = 13 \\ \frac{1}{(1-C+0.02)^\frac{-1}{3} - 1}, &\text{type} = 14 \\ C^\frac{3}{4}, &\text{type} = 15 \\ C^\frac{2}{3}, &\text{type} = 16 \\ C^\frac{1}{2}, &\text{type} = 17 \\ C^\frac{-1}{2}, &\text{type} = 18 \\ C, &\text{type} = 19 \\ C(1-C+0.02), &\text{type} = 20 \\ C^2(1-C+0.02), &\text{type} = 21 \\ C^\frac{3}{2}, &\text{type} = 22 \\ (1-C+0.01) 0.01 (C-0.01), &\text{type} = 23 \\ \end{cases}$

where $C$ is the species value bounded to $[0, 1]$ .

The following options are present in most boundary conditions/sources. The meaning of each option is as follows:

Power_Output: If specified, the total (integrated) power of the given BC/Src is calculated and stored into the global variable name specified as the power_output argument.
Toggle: If given, specifies which toggle block controls whether this BC is active or not.

Parameter	Value	Default
{of}	{of \| species \| subindex}	–
SpeciesName	string	–
{in}	{in \| material_phase}	–
MaterialPhaseName	string	–
{ls}	{levelset_phase \| ls}	–
MeshPartIdentifier	string	–
power_output	“string”	–
toggle	“string”	–
e	real	–
a	real	–
rho	real	–
delta_h	real	–
coef	real	–
pexp	real	–
r	real	–
Pref	real	–
Tref	real	–
type	integer	–