At this point we recall that Tv is just the derivative of H with respect to time (equation (3.a)) and that the mass balance yielded a relation for Pv in terms of H (equation (3.b)). Substituting these two equations into equation (14) yields:
At this point we recall that Tv is just the derivative of H with respect to time (equation (3.a)) and that the mass balance yielded a relation for Pv in terms of H (equation (3.b)). Substituting these two equations into equation (14) yields: