DPM injection

raymond350 · July 18, 2013, 01:39

Hi, wonder if anyone encounter this when they set up DPM droplet injection. The DPM particles will have a reverse flow phenomenon (the particles will flow upstream of flow, even though it is injected in a downstream position)

stuart23 · July 18, 2013, 21:08

How are you defining the injection? Is there a velocity component that could cause this? Also, what body forces do you have in your model?

Stu

raymond350 · July 19, 2013, 10:09

The injection can be pressure swirl or plain orifice. Think of a cylindrical duct with airflow flowing from left to right. There is a wall injection perpendicular to the wall and flow direction. The injected particles will flow to the left before making a u-turn to the right, hence why I described as reverse flow.

July 18, 2013, 01:39	DPM injection	#1
raymond350 New Member Join Date: Feb 2012 Posts: 18 Rep Power: 15	Hi, wonder if anyone encounter this when they set up DPM droplet injection. The DPM particles will have a reverse flow phenomenon (the particles will flow upstream of flow, even though it is injected in a downstream position)

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July 18, 2013, 21:08		#2
stuart23 Senior Member Stuart Buckingham Join Date: May 2010 Location: United Kingdom Posts: 267 Rep Power: 27	How are you defining the injection? Is there a velocity component that could cause this? Also, what body forces do you have in your model? Stu

July 19, 2013, 10:09		#3
raymond350 New Member Join Date: Feb 2012 Posts: 18 Rep Power: 15	The injection can be pressure swirl or plain orifice. Think of a cylindrical duct with airflow flowing from left to right. There is a wall injection perpendicular to the wall and flow direction. The injected particles will flow to the left before making a u-turn to the right, hence why I described as reverse flow.