Active Model H: Scalar Active Matter in a Momentum-Conserving Fluid.


We present a continuum theory of self-propelled particles, without alignment interactions, in a momentum-conserving solvent. To address phase separation, we introduce a dimensionless scalar concentration field ϕ with advective-diffusive dynamics. Activity creates a contribution Σ_{ij}=-κ[over ^][(∂_{i}ϕ)(∂_{j}ϕ)-(∇ϕ)^{2}δ_{ij}/d] to the deviatoric stress… (More)
DOI: 10.1103/PhysRevLett.115.188302

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