I am conducting an experiment in Hele-shaw cell (with a gap of 0.8 mm). Trying to develop a double diffusive instability in it Every time I face this problem of trapped air bubbles in the cell. Any suggestions or measure to prevent it ?
Try exchanging the filling solution by first filling the cell with ethanol, which has high henry's law constant and low surface tension, followed by exchanging ethanol with your test solution.
I did something like this with micro pump where my hele-shaw cell had two gate. before filling my cell I washed it with water and surfactant then with ethanol