The PhD Business School of Engineering Sciences is a broad range of research results on the international front in the basic subjects such as physics and mathematics, engineering mechanics with applications such as aerospace and automotive engineering. We also offer courses in engineering physics, mechanical engineering, automotive engineering and education, and "Open Entry" and a number of international programs of control.
The Flow Center Linn (www.flow.kth.se) organizes basic research in fluid mechanics at KTH and is one of the original twenty competencies centers founded by the Swedish Research Council (VR). The Centre was established with a vision of an outstanding environment for basic research in fluid mechanics, where innovative research leader is born and future research are encouraged to create.
Project
Group PhD Business stability and transition countries in Central Linn flow to applications for a PhD position on the issue of stability behind a blunt body. Finding the geometry of the blunt bodies in various technical drawings, as mentioned, most vehicles, bridges and skyscrapers just a few, but is prone to an absolute instability when subjected to a simple main stream. This instability manifests itself in the form of vortices from alternate sides of the body with a fixed frequency for a given flow main shed. The vortices are clear and strong neck and can lead to devastating periodic lateral forces that can lead to structural vibration and fatigue of the material. Other breakdowns are caused by this instability, air resistance and the generation of sound. A better understanding of this instability is essential in the search for control methods that can solve the problem of vortex formation in the body. In this PhD Business project the aim is to experimentally study the instability of wakes behind bluff bodies from a fundamental research point of view, both for the natural case as well as with various wake flow control methods applied. This is realized in a new experimental setup specially designed to perform parameter variations, which are most often not possible in usually fixed experimental geometries.
The goal is to enhance the understanding of how the initial conditions of the bluff body wake affects the flow instability behind bluff bodies and the effect of different means of flow control that are applied. Finding means to reduce or even kill the often devastating vortex shedding in the wake of bluff bodies can contribute to safer designs of structures and reduced energy consumption by vehicles.
Qualifications
We seek highly motivated candidates holding a Master of Science degree in engineering or applied physics, mechanical engineering applied mathematics or related areas, as well as good skills in oral and written communication in English. Also, the applicants should possess the ability to work independently.
Employment
A PhD Business successful candidate is expected to join the Stability and Transition research group at the Linn Flow Centre. The position will include about 80% research and 20% teaching assistance.
Form of employment: Time limited
Start date: According to agreement
The salary follows the directions provided by KTH
Application
Application deadline: May, 1st 2011
Employer`s reference number: S-2011-0271
Applications via email to:
Carolina Eneqvist
carolina@mech.kth.se
Write reference number in the email subject.
Applicants about to finish their M.Sc. degrees may be considered for the position. The final decision is expected to be taken latest in the beginning of June, 2011.
Application shall include the following documents in PDF format:
- A personal letter where the applicants describe themselves, their qualifications and interests. Of particular interest for this position is experience of experimental measurement techniques and should be pointed out explicitly (pdf)
- Curriculum Vitae, incl. names and addresses of two references (pdf)
- Grade transcripts from university/university college (pdf)
- Example of technical writing, e.g. essay, course report or paper (pdf)
ContactQueries concerning the project content can be directed to:
Associate professor Jens Fransson
Phone: +46 8 790 61 93
jensf@mech.kth.se
21.41
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