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Palabos Online Seminar Series

This seminar series presents applications and use cases achieved with Palabos. It is typically held on a monthly basis, on the first Wednesdays of the month. To cope with different time zones, the seminar is held at 10 am CET or 5 pm CET (see seminar description).

Next Seminar, August 4th

Date and Time: Wednesday August 4th, 10:00 am CET
Participation Link: Zoom link
Speaker: Dr. Helen Morrison
Title: Towards simulating the mobilization of objects on the sea floor
Abstract:
Sediment transport plays a major role in the potential mobilization of objects on the sea floor, as different phenomena can lead to scour, burial or even the complete exposure of an object and thus subject it to mobilization due to currents or waves. The presentation will focus on a sediment transport model based on the lattice Boltzmann (LB) method which is capable of predicting the influence of a unidirectional flow field on the development of the sand bed in the vicinity of arbitrarily shaped objects, even under turbulent conditions and relatively low resolution. The fluid phase of the simulation makes use of the 3D entropic multi-relaxation time collision model. For the simulation of the sediment transport, the advection–diffusion equation is solved via the LB method with an adapted version of the entropic multi-relaxation time collision model for a D3Q7 lattice. Erosion and sedimentation processes are included based on the critical Shields parameter, i.e. on the wall shear stress. Additionally, a brief outlook on our current project will be given, which aims at extending the presented model to incorporate different sediment transport phenomena and the actual movement of objects.

Sediment.png

Figure: Erosion and sedimentation around a horizontally bedded finite cylinder as obtained from a combined fluid flow and sediment transport simulation using the LB method.

Biography:
Dr. Helen Morrison is currently a postdoctoral researcher at Corvus Works UG (closely connected to the University of Rostock, Germany). She graduated in Physics with a focus on Astronomy and Computer Science from the University of Heidelberg (Germany) and completed her PhD in Fluid Mechanics at the University of Rostock. She uses the Lattice Boltzmann Method to focus on high Reynolds number flows, sediment transport and fluid structure interactions and currently mainly focuses on the interaction between sediment processes on the sea floor and unexploded ordnance.

Upcoming Seminars

September 1st, 2021, 5 pm CET      
October 6th, 2021, 5 pm CET      
November 3rd, 2021, TBA      
December 1st, 2021, TBA      

 

Past Seminars

Date Presenter Title    
July 7th, 2021 Philippe Mercier The impact of the seabed morphology on turbulence at tidal stream power sites Recording PDF
June 2nd, 2021 Jonathan Lemus Modelling Settling-Driven Gravitational Instabilities at the Base of Volcanic Clouds Using the LBM Recording PDF
May 5th, 2021 Jonas Latt From CPU to GPU in 80 days Recording PDF

Contact

Jonas Latt
High Performance Fluid Simulation
University of Geneva
jonas.latt(at)unige.ch

Participation

The Palabos Online Seminars are public. To participate, click on the Zoom link in the description of the seminar.

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