Sunil, Arjun Kozhikkatil, Rakesh Kumar, and Tide Porathoor Sunny. 2022. “Passive Downward Heat Transfer in Reverse Thermosyphon Enabled Bubble Pump With Two Working Media for U-Tube Solar Thermal Collector”. Trends in Sciences 19 (20). Nakhon Si Thammarat, Thailand:6234. https://doi.org/10.48048/tis.2022.6234.