Fouling prevention in polymerization reactors

A process for reducing reactor fouling in a homogeneous polymerization process, comprising:

• (a) providing one or more reactors with one or more feed entry ports wherein the reactors are configured in parallel, in series, or a combination thereof;
• (b) feeding to the one or more reactors through the one or more feed entry ports one or more reactor feed streams comprising:
• 1) an olefin monomer, 2) one or more catalyst systems, 3) optional one or more comonomers, 4) optional one or more scavengers, 5) optional one or more diluents or solvents, and 6) combinations thereof,
• wherein the one or more reactors arc at a temperature above the solid-fluid phase-transition temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa,
• wherein the polymerization system for each reactor is in its dense fluid state and comprises the olefin monomers, any comonomer present, any diluent or solvent present, any scavenger present, and the polymer product,
• wherein the catalyst system for each reactor train comprises one or more catalyst precursors, one or more activators, and optionally, one or more catalyst supports, and
• wherein the linear velocity of the one or more reactor feed streams passing through each of the one or more feed entry ports is greater than or equal to 0.3 m/min.