# 7.17.1.8.1. Butler_Volmer

Syntax

  Source For Current ([{of} SpeciesName] | [{in} MaterialPhaseName] | [{ls} {a | b | c}]) {@ | at | for | on | over} MeshPartIdentifier = Butler_Volmer ([R = r] | [F = f] | [Alpha_A = alpha_a] | [Alpha_C = alpha_c] | [Flux_Lim_A = flux_lim_a] | [Flux_Lim_C = flux_lim_c] | [Lumped = lumped] | [Sign = sign] | [A = a] | [K = k] | [Species_A = species_a] | [Species_B = species_b])

Summary

  Butler volmer source for current equation to be used with porous electrodes

Parameter | Value | Default
--- | --- | ---
{of} | {of | species | subindex} | –
SpeciesName | string | –
{in} | {in | material_phase} | –
MaterialPhaseName | string | –
{ls} | {levelset_phase | ls} | –
MeshPartIdentifier | string | –
r | real | 8.314
f | real | 9.649e+04
alpha_a | real | 0.5
alpha_c | real | 0.5
flux_lim_a | real | 0
flux_lim_c | real | 0
lumped | integer | –
sign | real | 1
a | real | 0
k | real | 0
species_a | “string” | –
species_b | “string” | –