Dear all,

I have a question in calculation about the "compute heat/flux command"

page(http://lammps.sandia.gov/doc/compute_heat_flux.html).

According to the document in this page, thermal conductivity is

defined as "V/(kb T^2) *integral(<Jx(0)><jx(t)>)dt".

Why does the input file example shown in this page calculate thermal

conductivity as below?

variable scale equal \{convert\}/{kB}/$T/$T/$V*s\*{dt}

variable k11 equal trap(f_JJ[3])*${scale}

I think this calculation means thermal conductivity is defined as

"1/(V kb T^2) * integral(<Jx(0)><jx(t)>)dt".

What makes this difference of way to use V?