![]() A general rule of thumb for axial or radial flow patterns is the diameter of the impeller be ⅓ of the vessel’s diameter, so a 10 cm beaker would require approximately 3 cm impeller. The size of vessel used for mixing will determine the diameter of the impeller. ![]() Tangential flow is often desired with very high viscosity mixing, achieved with an anchor paddle or square blade. The best known of these are the dispersion or saw tooth impellers. ![]() Certain radial flow impellers at high speeds can achieve the high shear required for fine emulsions and pigment dispersion depending on the formulation. Crossed blade and straight collapsible impellers provide radial flow. Radial flow is characterized with higher shea r and turbulence, beneficial for applications such as gas-liquid dispersion or emulsion mixing. The pitched blade turbine is primarily axial flow, but can have radial flow depending on several factors. The axial flow of marine propeller styled impellers is known for lower shear and good pumping rate. Axial flow is well suited for such applications as liquid-liquid blending, heat transfer, or stirring needing a vortex. ![]() Determine which factors produce the best results in your application, such as achieving a vortex, high or low shear, uniform heat distribution, or aeration.ĭefining the application will help identify a flow pattern that optimizes your process. Stirring for blending, emulsification, or solids suspension each have different requirements that certain impeller styles perform better than others. Identify the objectives of your mixing, what you want to achieve and what to avoid. Use these tips below to help identify an impeller for your mixing application. With the wide array of impeller styles and sizes available in the marketplace, it can be difficult to know where to begin. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |