High aspect ratio problem

This post was last edited by ylb913 on 2016-10-29 at 14:23. It seems to be a problem related to the degree of uniform mixing. The fluid enters from a smaller inlet and moves into a larger device volume; initially there is a deviation in the flow direction, either from one side or from the center – something that everyone is familiar with with showerheads. There is a process of expanding from a single point to the entire diameter. Then, at the outlet, as the flow converges at one point, there will be high central flow rates along with stagnation near the wall surfaces. The height-to-diameter ratio ensures there is sufficient length for \"full-diameter\" flow, which is necessary to meet the requirements of reaction contact, as well as those related to separation and absorption – that is, the requirements concerning the contact area and length (height) at full diameter.

The height-to-diameter ratio, as the name suggests, refers to the ratio of the height at which the catalyst is packed in the reactor to the diameter of the reactor; in simpler terms, it is the ratio of the reactor’s height to its diameter

I would like to ask whether, in practice, the higher the height-to-diameter ratio, the better?

The height-to-diameter ratio of the distillation tower – of course, a higher ratio results in better separation efficiency

It mainly depends on what the purpose is; whether the stripping section and the distillation section can function optimally