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September 12 - 18, 2021

Sep

Hybrid Applied Mathematics Seminar

Conference/Seminar

Talk Title: Solving Heat Transfer and Fluid Flow Problems with Reduced Order Models and Neural Networks

Speaker: Dr. Zilong Song Department of Math & Stat, USU

Abstract: The friction stir welding process can be modelled using a system of heat transfer and Navier-Stokes equations with a shear dependent viscosity. Finding numerical solutions of this system of nonlinear partial differential equations over a set of parameter space, however, is extremely time-consuming. Therefore, it is desirable to find a computationally efficient method that can be used to obtain an approximation of the solution with acceptable accuracy. In this talk, we present a reduced basis method for solving the parametrized coupled system of heat and Navier-Stokes equations using a proper orthogonal decomposition (POD). In addition, we apply a machine learning algorithm based on an artificial neural network (ANN) to learn (approximately) the relationship between relevant parameters and the POD coefficients. Our computational experiments demonstrate that substantial speed-up can be achieved while maintaining reasonable accuracy.

10:30 am - 11:30 am | Animal Science | More Info

Sep

Interaction Between Low-level Jets and Wind Turbine Arrays

Conference/Seminar

The low-level jet (LLJ) is a phenomenon that exhibits a pronounced velocity peak at the top of the stable boundary layer.

1:00 pm - 2:00 pm | Engineering Building | More Info

Sep

Biology Speaker Seminar Series: Dr. Anne Murphy

Conference/Seminar

Dr. Anne Murphy from Georgia State University will be presenting "Impact of Age and Sex on Opioid Modulation of Pain" in-person as well as on Zoom. Join the seminar in-person in LSB 207 or on Zoom: https://usu-edu.zoom.us/j/83955459503?pwd=bXhoNCtLb1UzTy9zcEV1V3ByUzZodz09

3:30 pm - 4:30 pm | Life Sciences Building | More Info

Sep

Interfacial Dynamics of Particles and Droplets at Fluid-fluid Interfaces

Conference/Seminar

Research Seminar Series presentation

1:00 pm - 2:00 pm | Engineering Building | More Info

Sep

Ecology Center Seminar Series - Dr. Beth Rose Middleton Manning

Conference/Seminar

Dr. Beth Rose Middleton Manning (Afro-Caribbean, Eastern European) is a Professor of Native American Studies at UC Davis. Beth Rose’s research centers on Native environmental policy and Native activism for site protection using conservation tools. Her broader research interests include intergenerational trauma and healing, rural environmental justice, indigenous analysis of climate change, Afro-indigeneity, and qualitative GIS.

4:00 pm - 5:00 pm | Life Sciences Building | More Info

Sep

Investigations of Turbulent Multiphase Flows Using Optical Measurement Techniques

Conference/Seminar

Small inertial particles in turbulence appear in a number of environmental flows such as dust, sand, rain, snow or sediment in the atmospheric boundary layer, in rivers, during deep-sea mining or on Mars. Particle dynamics, including accelerations and concentrations, depend (among other things) on gravity and inertia. In this talk I will present results of recent high-Reynolds-number experiments of inertial particles in turbulence which are performed in a turbulence box (Re? = 450) and an atmospheric boundary layer wind tunnel (Ret = 19,000). These results are of direct use in prediction and modeling of phenomena such as droplet growth in clouds, fall speed of snowflakes and particle concentrations in dust storms.

2:00 pm - 3:00 pm | Engineering Building | More Info

Sep