[dsmith]

Hi there,

I need to use Lagrangian particle tracking to model the generation of dust particles created from sanding wood on a lathe (the history of these particles is important).

I have information reguarding the particle size distributions created from sanding wood and have done the tutorials relating to this and rotating boundries.

What I want to know is it possible to set my model up so that these particles are emmited tangentially from my rotating wood source (rotating cylinder) at one location (along a line)? and if so, how do I do this? Or, is the best way to do this to perhaps have a thin slit as an inlet, tangential to where the particles are being emmitted?

Also, when creating a new material. Is it possible to do this without defining a molar mass? Wood particles don't have one.

Cheers,
Dane

[ghorrocks]

It's been a while since I did lagrangian stuff but I remember that particle injection points are totally separate from fluid inlets and outlets. That means you can stick a particle injection point anywhere you like, and make it shoot particles in any direction you like.

So do not use an inlet to inject the particles. Model the room with the particles being injected at the location and velocity in the middle.

You should not need to specify a molar mass. If you need to give it a number then just give it anything. Assuming the particles are inert and isothermal then the only property of importance is density.