Understanding CFD Tracer Study Simulation Data

Tracer · October 13, 2014, 13:15

Hello Everyone,
I'm a doing research on optimizing a reactor. I am the person working in the lab. I'm not sure how to use the data that I have received from the person running the CFD simulation It is the output from a tracer study simulation.

What is convergence history of scalar 0 on inlet/outlet?

What is the area-weighted average scalar? and the units for flow time?

I need to compare this data with my RTD which I generated in the lab. I treated the data from the CFD model as raw concentration data however it was off by an order of magnitude which leads me to believe I am using the data incorrectly. Any insight would be appreciated.
Thanks

John · October 15, 2014, 13:11

There are many factors on model validation. But first of all, have you normalized the two sets of tracer data before doing comparison?

Tracer · October 15, 2014, 14:20

John,
I did normalize the data, I treated the data from the simulation outlet as if it was raw data from a concentration vs time curve. I generated the E(t). The shape is the same in both cases however they are off by an order of magnitude which is why I am assuming there is something I am not understanding about the output from the simulation.

October 13, 2014, 13:15	Understanding CFD Tracer Study Simulation Data	#1
Tracer New Member Join Date: Oct 2014 Posts: 2 Rep Power: 0	Hello Everyone, I'm a doing research on optimizing a reactor. I am the person working in the lab. I'm not sure how to use the data that I have received from the person running the CFD simulation It is the output from a tracer study simulation. What is convergence history of scalar 0 on inlet/outlet? What is the area-weighted average scalar? and the units for flow time? I need to compare this data with my RTD which I generated in the lab. I treated the data from the CFD model as raw concentration data however it was off by an order of magnitude which leads me to believe I am using the data incorrectly. Any insight would be appreciated. Thanks

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Looking for 3D wind tunnel airfoil(wing) experimental data for CFD validation	Anna Tian	Main CFD Forum	18	June 3, 2015 23:56
Exporting data of transient simulation DURING a simulation, at user locations ?	Milan2013	CFX	0	April 18, 2014 04:47
Possible Bug in pimpleFoam (or createPatch) (or fluent3DMeshToFoam)	cfdonline2mohsen	OpenFOAM	3	October 21, 2013 10:28
Future CFD Research	Jas	Main CFD Forum	10	March 30, 2013 13:26
tracer study.. RTD...	lgp	FLUENT	5	February 21, 2003 12:43

October 15, 2014, 13:11		#2
John Member Join Date: Mar 2009 Posts: 49 Rep Power: 17	There are many factors on model validation. But first of all, have you normalized the two sets of tracer data before doing comparison?

October 15, 2014, 14:20		#3
Tracer New Member Join Date: Oct 2014 Posts: 2 Rep Power: 0	John, I did normalize the data, I treated the data from the simulation outlet as if it was raw data from a concentration vs time curve. I generated the E(t). The shape is the same in both cases however they are off by an order of magnitude which is why I am assuming there is something I am not understanding about the output from the simulation.