Visualization of the flow in a homogenizing valve was investigated using a commercial Computational Fluid Dynamics (CFD) code. The modeling showed that the valve can be modeled by CFD and that the resulting information compared well to results of previous experimental and theoretical investigations. The modeling gives the first detailed information available on the high fluid speeds in disruption valves. A possible use of the information obtained is to produce models for cell and fat globule disruption based on basic flow variables. The modeling gives the benefit of ＇quick＇ estimation of flow,: rather than having to use physical tests.