By Marshall J.S., Li S.
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Extra resources for Adhesive Particle Flows
On the two-way interaction between homogeneous turbulence and dispersed solid particles. I. Turbulence modification. Physics of Fluids A 5, 1790–1801 (1993). Ennis BJ, Li J, Tardos GI, Pfeffer R. The influence of viscosity on the strength of an axially strained pendular liquid bridge. Chemical Engineering Science 45(10), 3071–3088 (1990). Epstein PS, Carhart RR. The absorption of sound in suspensions and emulsions. Journal of the Acoustical Society of America 25(3), 553–565 (1953). Feng JQ, Hays DA.
The result of this liquid bridging force is to cause particles to adhere to container walls and to each other, forming particle agglomerates that resist gravitational and other forces, such as fluid shear, that try to tear them apart. A less-studied consequence of the presence of liquid films around particles in a wet granular flow is the effect of film asymmetry on the rolling motion of particles along container walls or during particle collisions with each other. Rolling is a critical form of particle interaction, which is typically far more likely to occur for systems of small particles than are sliding or twisting motions due to the lower threshold for onset of rolling than for these other motions.
12) Re p ≡ μ where ρ f is the fluid density. The difference vd ≡ v − u is called the particle slip velocity or drift velocity, depending on the context. Because |v − u| varies in time as a particle moves about, Re p is also a function of time. 13) = St Re f , μ L where Re f ≡ ρ f LU/μ is the flow Reynolds number. 1) can be used for the particle drag, assuming that other particles are sufficiently far away. For sufficiently small particles immersed in a gas, fluid slip at the particle surface becomes important and other forces, such as Brownian motion, also play an important role.
Adhesive Particle Flows by Marshall J.S., Li S.