Thank you very much, I really appreciate your response! :) Reading about flow reactions, it occured to me that liquid propellant rocket engines sort of satisfy

Thank you very much, I really appreciate your response! :) Reading about flow reactions, it occured to me that liquid propellant rocket engines sort of satisfy the definition - they often have liquid - sometimes gaseous - components entering the reactor (chamber), where they react, releasing heat, and the products of reaction are passing gasdynamic nozzle with the goal of increasing flow speed. One of the problems is to make sure propellants are reacting well - and the timing is critical, as propellants need to react during millisecond-level periods while they are still in the chamber. So I wondered what methods flow chemistry can offer to rocket injector designers regarding reaching good mixing. This question is important for different scale of engines - both mammoths like Saturn-V's F-1 and tiny reaction control system engines, which these days find their ways into cubesats. Thank you again!