I'm hoping everyone working on this has done this, but if not, here is something you should all do. Make a spreadsheet to define the following information.
1. Your WFC capacitance with air. Measure this BOTH ways as it will not be the same.
2. Multiply your results in step 1 by 78 to get the water capacitance value
3. You will need the AWG spec.
4. Based on values of steps 1 and 2, create equations to give you information to create coils that will provide resonant frequencies within the range of 100 Hz to 10 kHz for BOTH air and water capacitances for BOTH sides of the WFC. This will mean that your chokes will have different sizes based on each side of the WFC. While there is still water in the gap, the mismatched chokes sizes will allow current flow through the water to produce gas to replace the water. When the water in the gap is replaced by gas, this will then allow resonance to occur with the same frequency on both sides of the WFC.
5. Impedance matching for efficient power transfer.
Using this information, you should be able to calculate appropriate coil information that will be suitable with a low frequency when there is water in the WFC and when the water is replaced by gas in the WFC at a high frequency.
