Numerical investigation of synergistic interactions between fill ratio and inclination angle in nanofluid heat pipes. - Yang, Gang; Zhang, Ruitao; Li, Haoxuan; Zhang, Chunhua; Li, Gang; Gu, Xiaobin; Aminova, Alfiya I.; Guria, G. Th; Akkurt, Nevzat; Gao, Zhiying; Xu, Qian (Solar Energy Materials & Solar Cells, 2026)