SNIC SUPR
Computational fluid dynamics within energy conversion and food processing
Dnr:

SNIC 2019/3-679

Type:

SNIC Medium Compute

Principal Investigator:

Johan Revstedt

Affiliation:

Lunds universitet

Start Date:

2020-01-01

End Date:

2021-01-01

Primary Classification:

20306: Fluid Mechanics and Acoustics

Allocation

Abstract

This application is connected to our research activities within energy conversion related to rotating machinery (mainly wind turbines) and our activities related to the processing of liquid foods. Hence, the is a large span of challenges in these studies ranging simulating turbulent flows with very wide range of scales (atmospheric boundary layers) over fluid-structure interactions to rheologically complex multiphase flows. Below is an outline of the included studies. The main problems related to wind-turbines in cold climate include ice-accretion during certain seasons/periods. The overall aims of the project are to improve the modelling of ice accretion on wind turbine blades and to provide aerodynamic data for iced aerofoils to be used in full scale simulations of iced wind turbines that will be performed later. Hence, detailed studies of the ice accretion process using LES will be performed. The main aim of this food processing project is to improve the understanding of pipe flows of complex fluids containing high concentration of large particles. Hence, this requires performing detailed simulations of the flow and particle interactions. In this context we will also simulate the heat transfer from the pipe wall to the liquid and to the particles. This requires that the flow fields around the particles and at the walls are resolved. To achieve this one may employ interface tracking methods such as immersed boundary methods. Since the boundary layer around each particle needs to be resolved these types of simulations becomes computationally expensive when considering a large number of particles Vibrations in a compressor blade can originate from several sources, of which some are related to the geometry such as unsteadiness due to the upstream and downstream guide vanes, others are flow related and can for instance originate from separation of the flow on the blade, for example induced by shock waves. We will use our recently developed segregated FSI approach to study the interaction between flow and deformation in geometries related to turbine applications The scope of the proposed work includes aeroelastic simulations using either LES of DES.