Heat transfer in mixing vessels at low Reynolds numbers. An experimental study of temperature profiles heat transfer rates and power requirements for mechanically agitated vessels operating at low Reynolds numbers.

摘要

The present study investigates experimentally the laminarudmixing and heat transfer of a range of helical ribbonudand anchor impellers for both Newtonian and inelastic non-Newtonian fluids. The work also correlates theudexperimental data empirically in the form of dimensionlessudgroups.udIn order to estimate the relative importance and theudeffect of all the geometrical parameters on the mixingudpower and heat transfer, data from the published literatureudsources will be utilized and combined with the resultsudfrom this study. Thus, reliable empirical correlationsudwill be obtained which are applicable over the widestudrange of operating conditions.udThe study also investigates the ablity of the variousudimpellers to level out temerature distributions. Theudmeasurement of these temperature gradients and the impellerudpower requirements gives a measure of the mixing efficiencyudof the impeller used.