Abstract: A method of atomization control and related gas atomizing nozzles are described which enable variation of the degree of atomization, the liquid and gas flow rates and the atmospheric spray dilution. Varying the thickness of flowing liquid and adjacent atomizing gas sheets varies spray droplet size and atmospheric spray dilution. Transverse sheet size is varied to change nozzle capacity. Annular and linear sheet forming nozzles are described. Nozzles are also described with flexible divider walls whereby thickness of the flowing sheets may be varied by altering relative flow pressures.