A Mouth Portal, Fractal Flux Tubes and Ancient Knowledge
Near letter "A" there is a mouth portal. Image D also has one. The outflow on image A becomes wavy about halfway along it's path, and it gradually expands and seems to lose structure as it circles back to the inflow side at the right top of the circle.
Image B and D have green colorized on what I suspect a cross section of the walls of a flux tube, and it contains a smaller tube inside. Branches undergo the same swirling expansion and then spreading apart that was on image A. Image C is Arabic literature from the 1700s, and I think it's a flux tube too.
Image A is truly remarkable and fractally repeating at smaller scales. It is inside the 15th century Jami Masjid, in Champaner, Gujarat, India. I think it has knowledge we've lost in modern times. Is the outflow half of image A inflating, and the right inflow half deflating and leaking into the surroundings?