Residence time distribution multiphase flow

The first approach, which considers a single phase, proposes conventional multiphase flow models, such as ideal flow, dispersion, and residence time distribution models. The second approach, which takes into account two phases as bubble and emulsion, suggests different governing equations for each phase and considers a term for describing mass interchange between the two phases. 

What are the reasons that microreactors in many cases produce better results than conventional reactors In order to provide an optimal progress of a chemical reaction, different conditions must be fulfilled in the reactor First, a nearly ideal mixing of the reactants should be ensured, linked with the generation of an extended phase interface in multiphase reactions. Afterward, the required response time must be guaranteed by a residence time with preferentially narrow residence time distribution. Finally, the reactor heat necessary for the reaction must be supplied or carried off. In this connection, control of temperature, pressure, time of reaction, and flow velocity in reactors with small volume is carried out much... 

Microreactors create well-defined multiphase environments for the nanomaterial synthesis. The nanocrystal size and size distribution depend on the residence time and residence distribution. The axial dispersion effects assodated with the parabolic flow profile of typical microchannel contribute to a broader residence time distribution. A segmented-flow microreactor or droplet reactor offers an opportunity to solve this dispersion issue. Both gas-liquid and liquid-liquid segmented-flow microreactors have been reported [98]. Khan et al. [50] compared... 

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