20.500.12556/RUL-181283 Chladni figures reduce ohmic losses in alkaline electrolysis An method for hydrogen bubble removal through ultrasonic excitation applied directly through the cathode is presented in this work. High-speed imaging, pressure field measurements, and overvoltage monitoring were employed to characterize how cathode vibration in the 100 kHz range influences electrolytic efficiency. Upon the start of the vibration, hydrogen bubbles detached and migrated across the surface, forming distinct spatial patterns corresponding to the electrode’s vibrational modes and resembling Chladni figures. The bubble migration is dominated by the primary Bjerknes force arising from acoustic pressure gradients. This is confirmed by the Keller-Miksis model which predicts the observed movement of the bubbles to the pressure nodes. The work demonstrates that electrode vibrations significantly reduced ohmic losses, with overvoltage dropping 20% within 100 ms during a 2 s activation period. The voltage required 7 s to return to initial values after deactivation, indicating that pulsed vibration strategies can achieve superior efficiency compared to continuous running setups. alkaline electrolysis Bjerknes force hydrogen generation Chladni figures alkalna elektroliza Bjerknesova sila nastajanje vodika Chladnijeve oblike true false true Angleški jezik Slovenski jezik Članek v reviji 2026-03-30 14:13:40 2026-03-30 14:13:47 2026-03-31 04:47:06 0000-00-00 00:00:00 2026 0 0 8 str. Vol. 128, art. 107833 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.5:544.642 1350-4177 10.1016/j.ultsonch.2026.107833 273591299 Agrez_..._Chladni....pdf Agrez_..._Chladni....pdf 1 845644D1D4A6F7C99FD9DD8684EBF7EB 9484b24351779ce388ac2b697c6ed93507d2756200cdc8956f91380ae09c5a7e 15c5447c-2c32-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=231583 https://www.sciencedirect.com/science/article/pii/S1350417726000982 1 c3e99cbb-2c31-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=231582 Fakulteta za strojništvo 0 0 0