Twente Mass and Heat Transfer Water Tunnel: Temperature controlled turbulent multiphase channel flow with heat and mass transfer

• Published in: arXiv.org 2019-02
• Main Authors: Gvozdić, Biljana, On-Yu Dung, Dennis P M van Gils, Bruggert, Gert-Wim H, Alméras, Elise, Sun, Chao, Lohse, Detlef, Huisman, Sander G
• Format: Article
• Language: English
• Subjects: Channel flow; Fluid dynamics; Fluorescence; Fluoroscopic imaging; Heat; Heat flux; Heat transfer; Laser doppler velocimeters; Mass transfer; Multiphase flow; Particle image velocimetry; Particle tracking velocimetry; Saline solutions; Stainless steels; Temperature control; Turbulent flow; Two phase flow
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1902.05871

A new vertical water tunnel with global temperature control and the possibility for bubble and local heat & mass injection has been designed and constructed. The new facility offers the possibility to accurately study heat and mass transfer in turbulent multiphase flow (gas volume fraction up to \(8\%\)) with a Reynolds-number range from \(1.5 \times 10^4\) to \(3 \times 10^5\) in the case of water at room temperature. The tunnel is made of high-grade stainless steel permitting the use of salt solutions in excess of 15\(\%\) mass fraction. The tunnel has a volume of 300 liters. The tunnel has three interchangeable measurement sections of \(1\) m height but with different cross sections (\(0.3 \times 0.04 m^2\), \(0.3 \times 0.06 m^2\), \(0.3 \times 0.08 m^2\)). The glass vertical measurement sections allow for optical access to the flow, enabling techniques such as laser Doppler anemometry, particle image velocimetry, particle tracking velocimetry, and laser-induced fluorescent imaging. Local sensors can be introduced from the top and can be traversed using a built-in traverse system, allowing for e.g. local temperature, hot-wire, or local phase measurements. Combined with simultaneous velocity measurements, the local heat flux in single phase and two phase turbulent flows can thus be studied quantitatvely and precisely.