DYNAFLOW’s DF_DBM is an advanced multi-bubble dynamics code for Lagrangian tracking of a distribution of nuclei in a CFD computed or measured flow field. The code uses a spherical bubble dynamics model (Rayleigh-Plesset equation) improved with a Surface-Averaged Pressure (SAP) scheme which incorporates knowledge of non-spherical effects acquired from studying bubble dynamics in complex vortical flow fields using DYNAFLOW's three-dimensional code, 3DYNAFS©. DF_DBM has been coupled to ANSYS FLUENT as an add-on package, which is suitable for studying bubble cavitation inception and bubble entrainment.

DF_DBM follows individual bubbles and computes their dynamics. It works within FLUENT similar to FLUENT's Discrete Phase Model (DPM) particle tracking. Bubble growth and collapse dynamics is modeled by solving the Rayleigh-Plesset equation, and the effect of bubble size changes on the bubble transport is modeled by additional terms to the DPM particle motion equation. Industrial applications include cavitating flows, bubbly flows, cavitation inception, and cavitation noise, cavitation erosion in turbo-machinery, marine propellers, bubble plumes, and pipe flows, etc.

Additional Resources:

DF_DBMTM is a User Defined Function (UDF) for Fluent

Regions Served

Asia Pacific, Europe, MEA, North America, South America


Dr. Jin-Keun Choi
Principal Research Scientist
10621-J Iron Bridge Road
Jessup, MD 20794

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