Sediment underflows, commonly known as turbidity currents, are a type of density flow which occur in deep oceans, lakes and river mouths. Our computational models use Large Eddy Simulations (LES) and our experimental projects use ultrasonic Doppler velocity profiler (UDVP) measurements and photometric analysis to study the processes that take place during propagation, both in confined flume environments and unconfined basin environments.
Pelmard, J., Norris, S. and Friedrich, H. (2018). LES grid resolution requirements for the modelling of gravity currents. Computers & Fluids https://doi.org/10.1016/j.compfluid.2018.08.005
Wilson, R.I., Friedrich, H. and Stevens, C. (2019). Quantifying propagation characteristics of unconfined turbidity currents interacting with an obstacle within the slumping regime. Journal of Hydraulic Research https://doi.org/10.1080/00221686.2018.1494054
Wilson, R.I., Friedrich, H. and Stevens, C. (2018). Flow structure of unconfined turbidity currents interacting with an obstacle. Environmental Fluid Mechanics https://doi.org/10.1007/s10652-018-9631-7
Wilson, R.I. and Friedrich, H. (2018). Coupling of ultrasonic and photometric techniques for synchronous measurements of unconfined turbidity currents. Water https://doi.org/10.3390/w10091246
Wilson, R.I., Friedrich, H. and Stevens, C. (2018). Image thresholding process for combining photometry with intrusive flow instruments. Journal of Hydraulic Research. https://doi.org/10.1080/00221686.2017.1313320
Wilson, R.I., Friedrich, H. and Stevens, C. (2017). Turbulent entrainment in sediment-laden flows interacting with an obstacle. Physics of Fluids, 29, 036603. https://doi.org/10.1063/1.4979067