Actually I am using the CAB atomization secondary breakup model in CFX-Pre for venturi scrubber in order to see droplet dispersion when air strikes with liquid entering from water nozzles. I am unable to see that effect. I have calculated the weber number from formulae and it is greater than unity which is the requirement of droplet formation.I have used the air as continuous phase whereas water as particle transport fluid. Did any one know how to use that model I shall be very thankful.