This fraction may be determined by measurements made at the end of each experiment.
When comparisons are to be made between the heat transfer coefficient associated with
bolus flow and that associated with Poiseuille flow, it is important that the existence of
a be taken into account. One method of doing this is to define an idealized bolus flow for
which the velocity profile is parabolic, but which is otherwise identical with the given
bolus flow. Such an idealized bolus flow is defined by the parametric equations: