Colloidal Agglomerates in Tank Sludge: Impact on Waste Processing

Tingey, Joel M.; Berg, John D.; Keefer, Keith D.; Lea, Alan S.; Rector, David R.; Virden, Jud W.; Stenkamp, S.

doi:10.2172/825793

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Energy Balance Agglomeration Model1

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2017

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“…o In a typical waste sludge 39 o Agglomeration is based on the pre-collision energy balance and van der Waals'…”

Section: Energy Balance Agglomeration Modelmentioning

confidence: 99%

Simulation of deterministic energy-balance particle agglomeration in turbulent liquid-solid flows

Njobuenwu

Fairweather

2017

Physics of Fluids

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An efficient technique to simulate turbulent particle-laden flow at high mass loadings within the four-way coupled simulation regime is presented. The technique implements large-eddy simulation, discrete particle simulation, a deterministic treatment of inter-particle collisions and an energy-balanced particle agglomeration model. The algorithm to detect inter-particle collisions is such that the computational costs scale linearly with the number of particles present in the computational domain.On detection of a collision, particle agglomeration is tested based on the pre-collision are more frequent and efficient in forming agglomerates than those of coarser particles.The particle-particle interaction events show a strong dependency on the shear Reynolds number Re , while increasing the particle concentration effectively enhances particle collision and agglomeration whilst having only a minor influence on the agglomeration rate. Overall, the sensitivity of the particle-particle interaction events to the selected simulation parameters is found to influence the population and distribution of the primary particles and agglomerates formed.2

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“…o In a typical waste sludge 39 o Agglomeration is based on the pre-collision energy balance and van der Waals'…”

Section: Energy Balance Agglomeration Modelmentioning

confidence: 99%