Submitted by: Leslie Hanna, WRRL, 86-68560, 303.445.2146, lhanna@do.usbr.gov
Proposal ID: 9750
| Title |
| Hydraulic Modeling with abrupt changes in Reynold's no. |
| What Is the Primary Research Question You Are Proposing with this Proposal? | How do we continue to provide state-of-the-art solutions to problems in hydraulics involving structures that include areas where the Reynolds number (R#) drops abruptly in magnitude? Physical models of dams, spillways and outlet works are often necessary to solve design challenges in hydraulics. The laws of similitude using Froude scaling can usually be applied to study these structures because the R# is high enough to ignore viscous effects. However it is also often desirable to study the flow conditions downstream from these structures where stilling action causes the R# to drop considerably.In this case, the R# may no longer be high enough to match the friction/shear of the prototype to accurately simulate sediment transport and downstream flow conditions.If a correlation can be made between the drop in R# and the operations required to compensate for this drop, the model can be operated to more accurately reflect prototype flow conditions and thereby provide more accurate designs |