A New Mesh-Independent Model for Droplet/Particle Collision

New spatial decomposition method for accurate, mesh-independent agglomeration predictions in particle-laden flows

“…Moreover, a spatial-decomposition algorithm can prove useful in any Euler-Lagrange approach that relies on two independent meshes (one for the fluid phase and another one for the particle phase), since it will allow to design a mesh for the particle phase that respects some criteria allowing for more accurate and mesh-independent results. Several attempts have been made to reduce the mesh-dependency of the results [38,39,40,41,42]. For instance, Zhang et al [41] rely on the mesh used for the CFD simulations and reduce the mesh-dependence of O'Rourke method [28] by computing the agglomeration over a volume comprising the cell and its surrounding neighbours.…”

An industry-scale modeling for the turbulence agglomeration of fine particles

“…In this article, we have developed a comprehensive mixed Eulerian-Lagrangian model. Different from Sommerfeld's model, 16 our model searches for real collision pairs based on a new mesh-independent model 21 and uses appropriate turbulent collision kernels to calculate the collision frequencies. Benchmark simulations are carried out and compared with the results provided by the well-characterized experiment.…”

“…The particles within a parcel are assumed to be uniformly distributed in the control volume V c where the parcel is currently located. As discussed in our previous work, 21 rather than the mesh cell volume V, we use a physically reliable volume V pr as the control volume V c . The collision volume V pr is self-adjustable according to the local particle density.…”

“…The method has been validated to be mesh independent and efficient. 21 The collision frequency is then determined in analogy to the kinetic theory of gases, by the following equation…”

“…Duru et al's experiment 20 ). In our previous work, 21 we have established a new mesh-independent model using an adaptable control volume to search for real collision partners and calculate the collision probability. The model shows low computational expense and stable performance for complex engineering applications.…”