Master Thesis: Development of a Simplified CFD Model for In-Cylinder Flow in Two-Stroke Engines

Husqvarna Group; Huskvarna; Hybrid; SEK 400 000 - 600 000; Full time

Job summary

A leading outdoor power product company in Huskvarna is looking for master students in mechanical engineering for a thesis project in fluid mechanics. The project involves developing a simplified gas-exchange CFD simulation model for design optimization. Candidates will work on advanced simulation tools, with parts of the project possibly done remotely. Ideal for those passionate about fluid dynamics and engineering challenges. Apply by November 24th, 2025.

Qualifications

• Interest in fluid dynamics, simulation, and real-world engineering challenges.

Responsibilities

• Develop a simplified gas-exchange STAR-CCM+ CFD simulation model suitable for design optimization.
• Research two-stroke engine technology with focus on the gas-exchange process.
• Analyze the current in-cylinder CFD simulation methodology.
• Identify simplification opportunities and assess their impact on accuracy.
• Develop a simulation model with reduced computational cost.
• Perform design optimization to evaluate the simulation performance.
• Validate the results against full-scale CFD simulations.

Education

Master in mechanical engineering or similar, preferably with focus on fluid dynamics

Job description

We are now looking for master students within mechanical engineering that are interested in doing their thesis project at our Advanced CAE - Fluid Mechanics Department at Husqvarna Group!

Husqvarna has a long-standing tradition of developing high-performance two-stroke internal combustion engines for handheld products such as chainsaws and trimmers, where power-to-weight ratio and emissions performance are critical success factors.

To meet increasingly demanding performance and emissions targets, in-cylinder CFD simulations are used to analyze and optimize the gas-exchange process—the replacement of residual gases with fresh charge. While this methodology provides deep insight into flow dynamics, it is often computationally expensive, making it less suitable for automated design exploration.

Some parts of the thesis work can be done remotely but the majority of the simulation work is done at our premises in Huskvarna.

Objective

Develop a simplified gas-exchange STAR-CCM+ CFD simulation model suitable for design optimization.

• Investigate possible approaches for simplification of a full-scale gas-exchange simulation to reduce computational cost.
• Implement and evaluate the chosen approach.

Proper Area of Education

Master in mechanical engineering or similar, preferably with focus on fluid dynamics.

Thesis Work

• Research two-stroke engine technology with focus on the gas-exchange process.
• Analyze the current in-cylinder CFD simulation methodology.
• Identify simplification opportunities and assess their impact on accuracy.
• Develop a simulation model with reduced computational cost.
• Perform design optimization to evaluate the simulation performance.
• Validate the results against full-scale CFD simulations.

This project offers a unique opportunity to work with advanced simulation tools and contribute to the development of next-generation engine technologies. If you're passionate about fluid dynamics, simulation, and real-world engineering challenges—we’d love to hear from you!

How to Apply

Please send in your application with CV and cover letter no later than November 24th. Due to GDPR, we do not accept applications by email.

Start date of the thesis project is in the beginning of 2026.

For questions regarding the thesis project please contact: Simon Hjalmarsson - [e-mail]

Husqvarna Group is a world-leading producer of outdoor power products for garden, park and forest care. Products include chainsaws, trimmers, robotic lawn mowers and ride-on lawn mowers.

The Group is also the European leader in garden watering products and a world leader in cutting equipment and diamond tools for the construction and stone industries. The Group’s products and solutions are sold under the main brands Husqvarna & Gardena that serve professionals in more than 140 countries. The Group has around 14,000 employees in 40 countries.

Last date to apply: November 23, 2025