2025-11-25
Turbokollektorns prestanda - Vetenskaplig artikel publicerad i International Journal of Heat and Mass Transfer
By Niklas Hidman, Chalmers University of Technology
How internal fins enhance the thermohydraulic performance of geothermal pipes: A direct numerical simulation study
Niklas Hidman
Division of Fluid Dynamics, Department of Mechanical and Maritime Sciences, Chalmers University of Technology, Gothenburg, Sweden
Highlights
• Geothermal pipes with continuous internal fins are evaluated using DNS.
• Aim is to trigger unsteady flow at Re < 2300 and minimize pressure drop at Re > 2300.
• Performance of straight, helical and alternating helical fins assessed.
• Alternating helical fins most efficient at triggering unsteady flows at low Re.
• Number of fins, fin height and twist rate evaluated and promising design proposed.
Published article
Niklas Hidman
Division of Fluid Dynamics, Department of Mechanical and Maritime Sciences, Chalmers University of Technology, Gothenburg, Sweden
Highlights
• Geothermal pipes with continuous internal fins are evaluated using DNS.
• Aim is to trigger unsteady flow at Re < 2300 and minimize pressure drop at Re > 2300.
• Performance of straight, helical and alternating helical fins assessed.
• Alternating helical fins most efficient at triggering unsteady flows at low Re.
• Number of fins, fin height and twist rate evaluated and promising design proposed.
Published article
