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Drag reduction; turbulent wall flows; concentration measurements 20. AIISTRACT (C...nn. an rre Side of naeeos @ and idonII & 6 b iakowisw)>This study which examined a fully developed turbulent channel flow with polymer injection at the wall had two complimentary objectives. The first objective was to gain more understanding of the way in which long-chain, high-molecular-weight, water soluble polymers effect viscous drag reduction in turbulent wall flows. The second was to acquire information useful in the modeling of the transport processes in flows with polymer injection at the wall, particularly the high Schmidt number mixing process. A ' DD I J N 1 1473 EtoioN or I Nov 65 is oUooLETE SECURITY CLAXSIFICAYSON OF TWJIS PAGEIa.--- t- Ie.o