## Computational and Applied Mathematics Seminar

**Fall 2017**

**Mondays at 4:10 p.m. in 401 Carver
**

The CAM Seminar is organized in the ISU Mathematics Department. It brings speakers from inside and outside of ISU, raising issues and exchanging ideas on topics of current interest in the are of computational and applied mathematics.

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8/28 **Organization meeting**

9/04** Labor Day **

9/11

**Magnetohydrodynamic (MHD) flow in closed channels.**

**Monalisa Muns **

Iowa State University

**Abstract: **Channel flow of electrically charged fluid in presence of an external magnetic field is known as MHD flow. This has applications in metallurgy (liquid metal flow), MRI study of blood flow through vessels, microfluidic devices and so on. I shall be talking about how an external magnetic field affects the channel flow with wall constrictions/dilations of length Re^(1/7) and its properties.

9/20 Wednesday 2:10--3:00pm, Carver 401

**Scalings and saturation in infinite-dimensional control problems with applications to stochastic partial differential equations**

**David Herzog**

Iowa State University

**Abstract: **We discuss scaling methods which can be used to solve low mode control problems for nonlinear partial differential equations. These methods lead naturally to a infinite-dimensional generalization of the notion of saturation, originally due to Jurdjevic and Kupka in the finite-dimensional setting of ODEs. The methods will be highlighted by applying them to specific equations, including reaction-diffusion equations, the 2d/3d Euler/Navier-Stokes equations and the 2d Boussinesq equations. Applications to support properties of the laws solving randomly-forced versions of each of these equations will be noted.

9/25

**Multiscale simulation of wave-matter interactions**

**Stongting Luo**

Iowa State Universtiy

**Abstract:** I will discuss some multiscale problems rising from wave-matter interactions. Depending on the wavelength and size of the matter, different models are used, and appropriate schemes must be designed to capture the interactions faithfully. I will briefly talk about some problems and numerical methods for high-frequency wave propagation, kinetic models and nano optics.

10/02 TBA

10/09

**Luis Duque**

The University of Texas at Austin.