##### Department of Mathematics,

University of California San Diego

****************************

### Math 278 - Computational and Applied Mathematics Seminar

## Barbara Neuhierl

#### Siemens Corporate Research and Technologies, Munich

## The Lattice-Boltzmann-Method for Computational Aeroacoustics

##### Abstract:

The so-called Lattice-Boltzmann-Method is a relatively young numerical method for the computation of fluid mechanics. In contrary to 'classical' techniques of computational fluid dynamics where the Navier-Stokes-Equations - a system of partial differential equations describing the macroscopic behavior of a flow - are discretized and solved, the Lattice-Boltzmann-Method starts from the microscopic description of a flow, the Boltzmann-equation. It is a time-explicit procedure based on a strongly simplified kinetic theory, yet it is approximating the Navier-Stokes equations. The presentation gives a short overview about some basic principles of the Lattice-Boltzmann-Method. Typical engineering applications, in particular the feasibility of describing aeroacoustic phenomena (i.e. sound generated by flows which typically requires a time-dependent calculation of pressure and density within a fluid), are pointed out, and a partitioned approach for the coupled simulation of flows and structures is presented.

Host: Randy Bank

### November 29, 2007

### 10:30 AM

### AP&M 2402

****************************