Faculty
Faculty of Engineering
Supervisor Name
Dr. Remus Tutunea-Fatan
Keywords
skin friction, drag, coefficient, testing
Description
Traditionally fluid drag associated with skin friction is conducted by the measurement of constrained fluid flow across a textured surface. This works well for easy-to-handle fluids such as water and oil, however it is less feasible for fluids such as liquid metals. A device that measures the drag force on a surface through a static fluid would allow for different fluid types and sample geometries to be tested. A fish scale pattern consisted of overlapping repeating circular planes 3mm in diameter angled to achieve 0.14mm of depth was embossed onto a PMMA sheet. A control sample of smooth PMMA was used as a baseline for the sample with the surface treatment. The measured drag force values were calculated by averaging the 10 trials within the displacement range of 17mm to 117 mm such to negate irregularities associated with sample acceleration. The changing buoyancy force of the metal connecting rod in the fluid was considered as it was elevated out of the liquid during a given trial.
Acknowledgements
Thank you to Dr. Evgueni Bordatchev at NRC for being the main point of contact and supervisor.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License
Document Type
Poster
Included in
Application of Tensile Testing Machine For Measurement of Skin Friction Coefficient
Traditionally fluid drag associated with skin friction is conducted by the measurement of constrained fluid flow across a textured surface. This works well for easy-to-handle fluids such as water and oil, however it is less feasible for fluids such as liquid metals. A device that measures the drag force on a surface through a static fluid would allow for different fluid types and sample geometries to be tested. A fish scale pattern consisted of overlapping repeating circular planes 3mm in diameter angled to achieve 0.14mm of depth was embossed onto a PMMA sheet. A control sample of smooth PMMA was used as a baseline for the sample with the surface treatment. The measured drag force values were calculated by averaging the 10 trials within the displacement range of 17mm to 117 mm such to negate irregularities associated with sample acceleration. The changing buoyancy force of the metal connecting rod in the fluid was considered as it was elevated out of the liquid during a given trial.