Are you talking about heat flux or hydrogen flux?
Hydrogen flux seems to be a popular concept at the moment
Celani 2022
"Again, the hydrogen flux into the bulk or from the surface seems the be the key-factor that produce AHE."
Iwamura across the water from Sapporo is also talking about changing hydrogen flux..
"
We assume that hydrogen flux is
one of the key factors to induce condensed matter nuclear reactions and the hydrogen flux is intentionally arranged by the present experimental method. Hydrogen flux J from the nano-sized metal multilayer composite to the chamber is caused by gradient of hydrogen concentration and gradient of temperature...2020
My intuitive interpretation is that the hydrogen flux causes dissociation and reassociation of the H2 molecules as they migrate through catalytic sites iuntil finally a correct orientation of the'reactive hydrogen' is made.... which then causes energy release
the likelihood of forming reactive hydrogen rather than the commonly known H2 and H forms is very low... but the more flux you get the more interactions/orientations you get.
But you have to keep the hydrogen moving and changing orientation.. otherwise it stays
as H2/H "gathering moss.. For what its worth..