Methods are provided for automated coolant flow control for, for instance, facilitating cooling of multiple different electronic systems. The first zone forms a working surface and a first catalyzing material is disposed within voids of the diamond grains in the first zone. Each choke module is independently controllable relative to the other choke module to selectively enable and disable flow through the associated choke. In this case, the spectrum becomes irregular with sharp peaks and dips, which deteriorates the correlation characteristic.