@article{Tsai_1998 author = {Chia Wei Tsai and G. J. Hwang}, title = {A FLOW VISUALIZATION TECHNIQUE FOR VORTICAL WATER FLOW INSIDE A PIPE}, journal = {Journal of Flow Visualization and Image Processing}, issn = {1065-3090}, year = {1998}, volume = {5}, number = {1}, pages = {1--8} }