"another thing is that if you put the palm of your hand just above the vortex as it swirls you feel a definite energy rising"
Have you ever considered putting your hand in the toilet, and flushing it with the other hand to create a little vortex to see if you can feel your energy rising ?
No reason why that oughtn't work. Plus if it does, then given the size of typical toilets, the next step would be to consider sticking one's head in there and flushing, to get an even more definite energy rise.
Or, while the bathtub is draining, put your finger in the little swirl by the drain as the water is going down. So many cost-free ways to get a vortex.