30 credits - Water management simulations for truck

Scania genomgår nu en transformation från att vara en leverantör av lastbilar, bussar och motorer till en leverantör av kompletta och hållbara transportlösningar.


The exterior design of a vehicle is not only important for its aerodynamic performance, like drag and lift, but also affects other flow related properties which requires close attention. One such important area is prediction of water distribution and flow on crucial surfaces of the vehicle such as the wind shield, side glasses and side mirrors, in driving conditions, which has a direct impact on visibility and thereby driver safety.

SCANIA as a premium brand, spends a great deal of time and effort to design for good visibility and reduced soiling of the exterior parts of the vehicles. Currently, this is mainly done by means of physical testing, which is time consuming, costly and often applicable only rather late in a project. CFD simulations in this field, when conducted correctly, can be advantageous by offering the possibility to be used early in the project, giving deeper insight to the root cause of a problem and accelerate the design process by allowing several ideas to be examined before choosing a final solution.


A basis for this thesis work is to explore and gain understanding of the physics and mechanisms that govern how water on a surface behaves when subjected to wind and/or mechanical forces such as wiper movement. The ultimate goal is to provide a suitable procedure for water management CFD simulations for trucks and buses to be used at SCANIA in the design process.

Description of work

PowerFLOW is the main CFD code used for aerodynamic simulations at SCANIA. Recently, new water management functionalities have been implemented into the code, which includes water spray, film build-up and breakup and more, with numerous parameter settings. A large part of the work will deal with getting familiarized with the new functionalities and to find a suitable setup for truck/bus simulations for satisfactory results. This will include prediction of water distribution on areas important for the direct sight of the driver as well as water spray or splash on sensitive exterior parts such as sensors and cameras. There are already a number of test results available for comparison and validation purposes, but new tests can be performed if deemed necessary.

Final year M.Sc. student with background in fluid dynamics and an interest in CFD simulation and vehicle aerodynamics. Experience in CFD simulations will be considered favourably.

Number of students:


Start date:



January 2019

Estimated time needed:

20 weeks


Supervisor: Kamran Noghabai, 08 553 502 66, kamran.noghabai@scania.com

Group Manager: Per Jonsson, 08 553 85272, per.jonsson@scania.com




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