TY - JOUR
T1 - Hydrodynamic cavitation in micro channels with channel sizes of 100 and 750 micrometers
AU - Rooze, Joost
AU - André, Matthieu
AU - van der Gulik, Gert-Jan S.
AU - Fernández-Rivas, David
AU - Gardeniers, Johannes G.E.
AU - Rebrov, Evgeny V.
AU - Schouten, Jaap C.
AU - Keurentjes, J.T.F.
PY - 2012/10/26
Y1 - 2012/10/26
N2 - Decreasing the constriction size and residence time in hydrodynamic cavitation is predicted to give increased hot spot temperatures at bubble collapse and increased radical formation rate. Cavitation in a 100 × 100 μm2 rectangular micro channel and in a circular 750 μm diameter milli channel has been investigated with computational fluid dynamics software and with imaging and radical production experiments. No radical production has been measured in the micro channel. This is probably because there is no spherically symmetrical collapse of the gas pockets in the channel which yield high hot spot temperatures. The potassium iodide oxidation yield in the presence of chlorohydrocarbons in the milli channel of up to 60 nM min−1 is comparable to values reported on hydrodynamic cavitation in literature, but lower than values for ultrasonic cavitation. These small constrictions can create high apparent cavitation collapse frequencies
AB - Decreasing the constriction size and residence time in hydrodynamic cavitation is predicted to give increased hot spot temperatures at bubble collapse and increased radical formation rate. Cavitation in a 100 × 100 μm2 rectangular micro channel and in a circular 750 μm diameter milli channel has been investigated with computational fluid dynamics software and with imaging and radical production experiments. No radical production has been measured in the micro channel. This is probably because there is no spherically symmetrical collapse of the gas pockets in the channel which yield high hot spot temperatures. The potassium iodide oxidation yield in the presence of chlorohydrocarbons in the milli channel of up to 60 nM min−1 is comparable to values reported on hydrodynamic cavitation in literature, but lower than values for ultrasonic cavitation. These small constrictions can create high apparent cavitation collapse frequencies
U2 - 10.1007/s10404-011-0891-5
DO - 10.1007/s10404-011-0891-5
M3 - Article
SN - 1613-4982
VL - 12
SP - 499
EP - 508
JO - Microfluidics and nanofluidics
JF - Microfluidics and nanofluidics
IS - 1-4
ER -