Diffusion Reaction with VDB. How can we make it?

[fxpear]

How can we get a Diffusion Reaction with VDB? 
It is a continuous loop of "blur" -> "Edge detection" -> "sharpe" -> back to start

This guys explain very well and implementet it in Holdini 

Part I: https://youtu.be/1S39WgB9F60
Part II: https://youtu.be/A5JEilobqdM
Part III: https://youtu.be/iuCg-WI8YeQ

I'm stuck with the implementation in tyFlow.
We have Filter(Dilate), Modify... but honestly, Im lost. 

Someone did it and posted in FB, but he said it will take a while until come up with a tutorial.

If you have some light on this topic, it will be great for all of us