Abstract
In aqueous solutions of cetyltrimethylammonium bromide (CTAB), wormlike micelles are formed at concentrations above a critical micelle concentration. In addition when counter ion is added to a CTAB solution, wormlike micelles entangle to form networks, which have gel-like structures under some conditions. The present study investigates the formation of gel-like structures when an aqueous solution of sodium salicylate (NaSal) is injected into a flow of a CTAB solution in a circular channel. The condition at which the adhesion of gel to a channel wall occurs is relevant to both the concentration of NaSal and the flow velocity of CTAB solutions. When the concentration is high, the adhesion is observed even at high velocities. Experimental results imply that salicylate ions in injected fluids have an important role in both the adhesion and the growth phenomena of gel-like materials on the channel wall and these phenomena depend on the concentration of NaSal.
