Jannette Frandsen

BSc, MSc (D.I.C.), PhD Cambridge
Senior Lecturer
Environmental Fluids Group

School of Civil Engineering, Room 406
Phone: +61 2 9351 xxx
Fax: +61 2 9351 3343
Email: J.Frandsen@usyd.edu.au

About Jannette

Jannette Frandsen received her B.Sc. from the Technical University of Denmark, M.Sc. from Imperial College London and the doctorate at Cambridge. She was appointed a Departmental Lecturership at Oxford and concurrently held a Fellowship at Oriel College. She has also taught and undertaken research in USA. She was awarded the US NSF CAREER Award in 2004. She currently serves as a senior lecturer at School of Civil Engrg., The University of Sydney. Her teaching and research interests are in the areas of fluid dynamics, nonlinear free-surface water waves and fluid-structure interactions.

The common theme of Dr. Frandsen's research includes investigations of free-surface gravity water waves and bluff-body boundary layer physics. Combining fluid dynamics and elasticity is one goal of the research but the understanding and the predictions of the fluid dynamics itself tend to represent the main challenges. The treatment and behaviour of high Reynolds and Froude no. flows are the primary question to address.

Dr. Frandsen has taught and concentrated on classes in the field of structural analysis, fluid dynamics, structural dynamics, fluid-structure interactions, numerical analysis, partial differential equations, and nonlinear fluids phenomena.

Underpinning her academic experience, Dr. Frandsen spent several years working in industry. She joined Hoejgaard and Schultz (1988) working part-time on structural mechanics problem. She was appointed a full-time job at Kvaerner Earl & Wright (1991) where she got involved with conceptual and detailed analysis/design of fixed and floating offshore platforms. Hereafter, she worked for Tarmac Black and Veatch and Dar-Al-Handasah (U.K.) where she undertook analysis and design of bridges, harbour and military structures. She has also worked on joint venture projects in Norway, Singapore and Australia including offshore projects at Hardcastle Richards Earl & Right, Kvaerner R J. Brown and Kvaerner oil & Gas.

Research interests & current/recent research projects

Jannette's work involves advancing research and education in fluid dynamics and fluid-structure interaction processes. The goal has mainly been pursued through numerical model development. In support of the numerical research, however, some physical experiments and theoretical work has been undertaken. Her research program have contributed extensively in fluid-structure interaction modelling mainly benefiting ocean and wind engineering communities to solve vibration problems of structures.

Below is highlighted on-going research including main research achievements:

Dr. Frandsen has contributed through the development of user defined functions as a part of an advanced numerical Finite Element (FE) coupled solver. The FE studies have included simulations of fluid flow interaction with fixed and elastically suspended solid bodies in high Reynolds number flows. Investigations have been undertaken numerically and experimentally to understand why solid bodies undergo large movement in certain fluid flow conditions.
Solutions have been sought to suppress these vibration problems. Addressing the latter concern, Dr. Frandsen has developed numerical means of predicting fluid-structure-damper behaviour. In particular, liquid damping devices have been tested numerically. The aim is to extract optimum damping from minimum sized devices. With this in mind, a current mathematical model is under development to explore the effects at the free surface when embedded in a magnetic field.
Dr. Frandsen has further developed a fully nonlinear potential flow solver to analyse the nonlinearities of free-surface water waves. She has set-up experimental tests to investigate sloshing motions in forced excited tanks which has lead into on-going (1) breaking wave studies; (2) wind-wave interaction investigations and (3) wave motion studies in harbours.
A major research project theme explores ocean and wind physics within the atmospheric boundary layer. Dr. Frandsen has developed a single phase lattice Boltzmann model, to predict (1) free surface water waves, in particular long waves in shallow depth, and (2) vortex-induced vibrations. Wave run-up on beaches and bore simulations have been carried out amongst other classical problems. Some tsunami predictions have also been undertaken. Good agreement with Riemann and experimental solutions has been achieved.

In general, the on-going research includes wave breaking predictions using advanced numerical techniques. Wind-wave interaction features are examined. The effects of fixed/floating and elastically suspended bluff-bodies embedded in fluid flow are another related project theme under investigations. Further development on nearshore hydrodynamics modelling is also part of our active research program to include the effects of wave breaking and sediment transport during wave run-up. Predictions of tidal bores in rivers, tsunami and hurricane induced waves to address storm surges and forces on structures are also important applications within Jannette's research program. Latest additions are projects on ocean and wind renewable energy devices.

Current Research Projects

Publications

Frandsen, J.B. (2008). "A simple LBE wave run-up model". In Progress in Computational Fluid Dynamics , Vol. 8, Nos. 1-4, pp. 222-232.
Frandsen, J.B. (2008). Chapter title: "Free-surface Lattice Boltzmann modeling in single phase flows". Advanced numerical models for simulating tsunami waves and runup. (pp. 57). Extended abstract: "A 1-D Lattice Boltzmann model applied to tsunami runup onto a plane beach". (pp. 26). Eds.: P. L.-F. Liu, H. Yeh, C. Synolakis. Advances in Coastal and Ocean Engineering. Vol. 10. World Scientific.
Frandsen, J.B. (2006). "Free surface water wave 1-D LBGK predictions". In Intl. Journal of Computational Fluid Dynamics, Vol. 20, No. 6, pp. 427-437.
Frandsen, J.B. (2005). "Numerical predictions of tuned liquid tank structural systems". Journal of Fluids and Structures, Vol. 20, No. 3, pp. 309-329.
Frandsen, J.B. (2004). "Sloshing motions in excited tanks". In Journal of Computational Physics, Vol. 196, 1, pp. 53-87.
Frandsen, J.B. (2004). "Numerical bridge deck studies using finite elements. Part I: Flutter". Journal of Fluids and Structures, Vol.19, No. 2, pp.171-191.
Frandsen, J.B. and Borthwick, A.G.L. (2003). "Simulations of sloshing motions in fixed and vertically excited containers using a 2-D inviscid σ-transformed finite difference solver." In Journal of Fluids and Structures, Vol.18, No. 2, pp.197-214.
Frandsen, J.B. (2001). "Simultaneous pressures and accelerations measured full-scale on the Great Belt East suspension bridge." In Journal of Wind Engineering and Industrial Aerodynamics, Vol.89, No.1, pp.95-129.

Teaching and Learning

Teaching Duties
CIVL3612 Fluids and Environmental Engineering
CIVL4614 Hydrology and Wind Engineering

Civil Engineering