UNDERWATER FLOW VISUALIZATION TECHNIQUES

Abstract
Flow visualization techniques useful for studies of models and live fish, have been developed by he N val Or nance Test Station in conjunction with the Fish ries Research Institute of the University of Washington. General patterns of the flow around fish are shown by means of flow marker t c niqu s. Becau of the incompa ibili y of e fish with flow markers, these techniques ere not ntirely successful. Boundary layer phenomena are shown by means of a Schlieren technique. The Schlieren technique appears to be a powerful new tool for boun ry layer studies.

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