[hal-01077482] Improved precision of hydraulic conductance measurements using a Cochard rotor in two different centrifuges

An improved way of calculating hydraulic conductance K in a Cochard cavitron is described Usually K is determined by measuring how fast water levels equilibrate between two reservoirs while a stem spins in a centrifuge A regression of log meniscus position versus time was used to calculate K and this regression method was compared to the old technique that takes the average of discrete values Results of a hybrid Populus 84K shows that the relative error of the new approach is significantly lower than the old technique by 4~5 times The new computational method results in a relative error less than 05% or 03% from 8 or 12 points of measurement respectively The improved precision of K measurement also requires accurate assessment of stem temperature because temperature changes K by 24% o C -1 A computational algorithm for estimating stem temperature stability in a cavitron rotor was derived This algorithm provides information on how long it takes stem temperature to be known to within an error of ±01 o C



from HAL : Dernières publications http://ift.tt/1wBzTOK