until recenty generating clouds of microbubbles was a relatively expensive proposition,with the smallest bubbles requiring high energy density from either the saturation nucleation mechanism or Ventury effect.Due to the expense of processing with microbubbles,exploration of the acceleration efect of microbubbles for physico-chemical prosesses are larely unstudied,particularly those that are combined effects.In this paper,The trade-off between heat transfer ad evaporation on the microbubble interface are explored largely by computational modelling but supported by some experimental evidence.The hypothesis is that both processes are inherently transient,but that during short residence times,vaporization is favoured,while at longer residence times,sensible heat transfer dominates and results in re-condensation of the intially vaporized liquid.The computational model address how thin a layer tickness will result in the maximum absolute vaporization,after which sensible heat transfer condenses the vapour as the bubble cools.