Journal of Applied Fluid MechanicsJAFMMechanical Engineeringhttp://jafmonline.net1admin173535721735364510.18869/acadpub.jafmenjalali1394410gregorian20157183online1fulltexten10.18869/acadpub.jafm.67.222.19396A Proposed Solution for the Settling Velocity of Coplanar Aggregates of Identical Spheres in Creeping Motion.generalResearchThis paper derives a solution for the settling velocity of isolated coplanar aggregates of n identical spherical particles in creeping motion based on the Wall Shear-Pressure Gradient-Expansion model (WPE) previously derived by the author. The solution is reached by developing geometry-equilibrium mathematical constructs to decide on the dimensions of the free ambient expansions surrounding the aggregates to compute the entire velocity profile. A rational to decide on the orientation and stability of rotation is also proposed. The results compare well with the outcome of available theory and some relevant data sets.Doublet; Triplet; Settling velocity; Wall shear; Expansion; Non spherical particles; Spherical aggregates; Pressure gradient.399407http://jafmonline.net/JournalArchive/download?file_ID=36931&issue_ID=222Y.Mendezinfo@independentresearchgroup.ca`NoIndependent Research Group, Ottawa, Ontario, K2B 5W9`