November 10, 2020 at 10:34 pmshal3391Subscriber
I am running a DPM injection of water into a 3D domain using a plain orifice single phase atomiser. However the DPM parcels are just hovering at the injection point as shown in the attached figure. WHat could be some possible reasons for this?
ThanksNovember 11, 2020 at 10:57 amRobForum ModeratorHow many time steps have you run? nNovember 11, 2020 at 10:38 pmshal3391SubscriberNearly 100 now, but the time step has reduced to 1e-08, which is the lower limit of my adaptive time-step criteria. nNovember 12, 2020 at 6:52 amNovember 12, 2020 at 9:51 amDrAmineAnsys EmployeeWhat does the particle summary tell? Also please test with 2020R2.nNovember 12, 2020 at 9:51 amRobForum ModeratorWhat does the flow field look like in that area? nNovember 12, 2020 at 9:54 amDrAmineAnsys EmployeeHow does the pressure field look in that region?nNovember 12, 2020 at 11:11 amNovember 12, 2020 at 11:13 amshal3391SubscriberI have used 2020R1 and gotten the same result. nParticle summary: Advancing DPM injections ....nnumber tracked = 105534, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0, incomplete_parallel = 0, shed = 0nNovember 12, 2020 at 12:05 pmRobForum ModeratorThe odd bit there is that you have interior labels set as walls, can you check you've not turned the cell facets into walls somewhere. The DPM tracks make sense for transient particles as they're not going anywhere they've not really done anything. If you turn off transient on the particles what does the plot look like? nNovember 12, 2020 at 12:58 pmDrAmineAnsys Employeepressure field is odd. Check what Rob suggested. The plain orifices require reasnoable total pressure at the injection position to work its algorithm.nViewing 10 reply threads
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