Author(s): Larry Weber; Heqing Huang; Yong Lai
Linked Author(s): Larry J. Weber
Keywords: Gas supersaturation; Bubble disease; Water quality; Numericalsimulation
Abstract: It is found in 1960s that excessive gas supersaturation happened downstream of dam spillway will lead to lethal bubble disease for precious fish species. EPA in 1986 has set the total gas supersaturation standard as110% for better environment not only for man, but for fish also. In USA today, there is an urgent need to investigating ways to bring down gas supersaturation. This numerical model is developed to meet the need and cutting experimental cost. Based on the recent advances in the fields of air bubble entrainment, numerical gas saturation, supersaturation and flow simulations, the method for building 2D and 3D models are discussed in the paper. Preliminary simulation results shows the proposed comprehensive numerical model can well simulate the gas supersaturation downstream of dam spillway, as well as suggest possible methods of solving problem by parameter studies.
Year: 2001