Help Particles and fluid not rendering in running game

[josemendez]

那么，如何更改粒子的实际大小？水颗粒太大而无法进入狭窄的试管开口。

I believe your question reads:

So how do I change the actual size of the particles? Water particles are too large to enter the narrow test tube opening.

Answer is: by increasing the blueprint's resolution. See:
http://obi.virtualmethodstudio.com/tutor...rials.html