(399a) Introduction: Stuart Cooper, Ohio State University
AIChE Annual Meeting
2022
2022 Annual Meeting
Liaison Functions
Plenary Session: Turbulence and Mixing – In Memory of Professor Robert Brodkey II (Invited Talks)
Tuesday, November 15, 2022 - 3:30pm to 3:35pm
A second experiment using measurements made with stereo PIV and PLIF involved the transport and mixing in a multi-inlet vortex reactor (MIVR). This is a device scaled up from microreactors used to determine rates of fast reactions in order to determine the suitability for large-scale nanoprecipitation applications. A rather flat cylindrical reaction chamber has four horizontal tangential inlets and a vertical withdrawal tube on the cylinderâs axis, with fluid dye in alternate inlets. The fluid entering the chamber undergoes a helical path on its way from the inlets until it reaches the vertical outlet with a 5-fold increase in velocity. There appears to be no net shear associated with the transport and mixing, but rather considerable stretching of fluid elements occurs with concomitant increase in local scalar gradients along directions of compressive strain, resulting in rapid mixing, as also suggested by previous DNS results in a study of chemical reactions.