Static mixers are in-line devices, which consist of motionless mixing elements, inserted in the given length of the pipe or channel. Homogenization is attained by using the flow energy of the material to be mixed. The mixing effect depends on the continuous separation, distribution and reuniting of the stream of material. The number of elements and their shape required in any application depend on the complexity of the mixing process. The objectives of this study were to develop a new static mixer and to perform the experimental investigation of pressure drop and mixing efficiency in the new one and two different types. The test fluids used were Glycerin and gear oil. Pressure drops were measured using a hydraulic manometer. The axial and cross-sectional mixing efficiency were recorded photographically using a digital camera. The pressure drop of the new mixer was about 20% less than that of the Sulzer mixer, whereas the mixing efficiency of the new one was not so good as that of the Sulzer one.
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