[attaullah]

Need help;

I am running my simulation in which there are injections and particles are injected using DPM model. The simulation went well for the 2000 iterations but after that it did not inject the right number of particle parcels in the domain rather than it is showing the following msg in console
arning: Injection injection-0: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-1: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-10: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-11: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-2: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-3: LOST 2 out of 20 injection locations, probably outside the domain

Kindly help if somebody has any experience with that.

Regards;

Atta

[KaLium]

How is your injection defined? Surface or file?

[attaullah]

Originally Posted by KaLium

How is your injection defined? Surface or file?

Thanks for response.

I have defined the injections as plain orifice atomizer.

Regards;

[KaLium]

I assume you are running fluent in parallel.

Check from 'Models - Discrete Phase - Parallel' which option are you using: 'Shared memory' or 'Message passing'?

I once had very similar problem with one of these options. I don't remember which one. Maybe you can try both.

[sewgolam]

hallo everyone.

I want to inject nano particle in fluent.I have a reactangular geometry.But when I inject particle at my inlet the residual blow off and the solution divergence.Any help please??

[KaLium]

I had something here, but it does not fit your problem.

For some reason, I can't delete this post.

[n9879005]

hi,

i am facing some difficulties to inject nano particle in fluent. i know how set micro particle in fluent. what is difference between micro and nano particle set up in fluent .is there any one who can help me?.

thanks in advance.

[KaLium]

Originally Posted by n9879005

hi,

i am facing some difficulties to inject nano particle in fluent. i know how set micro particle in fluent. what is difference between micro and nano particle set up in fluent .is there any one who can help me?.

thanks in advance.

what difficulties?

[n9879005]

when I inject 10676 the particle size 3e-09 and run the simulation .After simulation I got this type of result number tracked = 1, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0.but the boundary condition was trapped.is there any other addition setting for Nano particle injection. is gravity is consider for Nano particle?

thanks for your cooperation.

[KaLium]

Originally Posted by n9879005

when I inject 10676 the particle size 3e-09 and run the simulation .After simulation I got this type of result number tracked = 1, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0.but the boundary condition was trapped.is there any other addition setting for Nano particle injection. is gravity is consider for Nano particle?

thanks for your cooperation.

You inject 10676 particles and only 1 tracked? How many particles do you see if list the injection? (discrete phase / injections / injection - list)

https://www.sharcnet.ca/Software/Ans...te_inject.html

[n9879005]

From injection list I see it 627

[KaLium]

how is your injection defined?

[n9879005]

injection defined as a surface. can you please help me what is the additional set up is required when the particle will change from micro particle to Nano particle? i think if I get it then I can solve the problem.

thanks in advance for your help.

[n9879005]

is gravity is consider for Nano particle case ?

can any one help me ?

thanks in advance...

[forDroplet Spray]

Originally Posted by attaullah

Need help;

I am running my simulation in which there are injections and particles are injected using DPM model. The simulation went well for the 2000 iterations but after that it did not inject the right number of particle parcels in the domain rather than it is showing the following msg in console
arning: Injection injection-0: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-1: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-10: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-11: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-2: LOST 2 out of 20 injection locations, probably outside the domain. This will inject 10% LESS MASS.

Plain orifice nozzle is single phase

Warning: Injection injection-3: LOST 2 out of 20 injection locations, probably outside the domain

Kindly help if somebody has any experience with that.

Regards;

Atta

Hi,attaullah,sorry for bothering.
i faced the same problem(lost injections locations) which you met before.
i use plain orifice model too.Could you please tell me how to solve it?
In fact, i checked the ideal atomizer position in Design Model and Solidworks, no error shown for that.
Thanks for your help.

[Mahnoor]

Copied from Ansys support website:

When setting up an injection and using the “List” option (say, to verify the number of injection points), this error for “lost particles” can show up if:
1. One or more of the injection point co-ordinates are lying outside the meshed regions
2. Case file is not yet initialized, or the data file is not yet loaded

[Nikz shukla]

Injection injection-0: 20 particles lost outside the domain while spanning over partitions.
number tracked = 0

[Nikz shukla]

i am doing but even after initialization its not working