Separation Criteria for Off-Axis Binary Drop Collisions | Zendy

Mary Saroka | Zendy; Nasser Ashgriz | Zendy

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Separation Criteria for Off-Axis Binary Drop Collisions

Author(s) -

Mary Saroka,

Nasser Ashgriz

Publication year - 2015

Publication title -

journal of fluids

Language(s) - English

Resource type - Journals

eISSN - 2356-7376

pISSN - 2314-6826

DOI - 10.1155/2015/405696

Subject(s) - collision , separation (statistics) , reynolds number , weber number , mechanics , coalescence (physics) , binary number , drop (telecommunication) , plane (geometry) , physics , statistical physics , materials science , mathematics , geometry , statistics , computer science , telecommunications , computer security , arithmetic , astrobiology , turbulence

Off-axis collisions of two equal size droplets are investigated numerically. Various governing processes in such collisions are discussed. Several commonly used theoretical models that predict the onset of separation after collision are evaluated based on the processes observed numerically. A separation criterion based on droplet deformation is found. The numerical results are used to assess the validity of some commonly used phenomenological models for drop separation after collision. Also, a critical Weber number for the droplet separation after grazing collision is reported. The effect of Reynolds number is investigated and regions of permanent coalescence and separation are plotted in a Weber-Reynolds number plane for high impact parameter collisions

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