To determine whether the flow is laminar or turbulent requires that you calculate the Reynold's number of the flowing fluid. However, the above equation is not applicable for turbulent flow where a large amount of the shear stress is due to the exchange of momentum between adjacent layers of the fluid. This results in the important equation for fluid shear for viscous or laminar flow: The derivative dv/dy is called the velocity gradient. Viscosity is usually denoted by the Greek symbol μ (mu) and is defined as the ratio of shearing stress τ (Greek letter tau) to the rate of change of velocity, v, which in mathematical terms can be expressed as dv/dy (where this is the derivative of the of the velocity with respect to the distance y). We also provide testing facilities for measurements of Surface tension, Contact angle, surface free energy, CMC, wetting studies on pharmaceutical powders, stability of emulsions, suspensions and dispersion like pharmaceutical suspensions, body care products like sun cream, shampoo, ink, paint, flavored milk etc.Fluid Viscosity Properties Fluid Viscosityįluid Viscosity, sometimes referred to as dynamic viscosity or absolute viscosity, is the fluid's resistance to flow, which is caused by a shearing stress within a flowing fluid and between a flowing fluid and its container. The product include Gas Hydrate Autoclave, Rocking Cell, Cold Finger Test, Wax Flow Loop, Turbulence Rheometer, H2S Analyzer, Thermal conductivity, Titrimeter etc. Under this range, we are offering Surface Tensiometers, Contact Angle Measuring Systems, Zeta Potential Analyzer, Dynamic Foam Analyzer, Emulsion Stability Apparatus, Viscometer, Rheometer, & Film Drying Analysis equipments.Ī range of test equipments for Petroleum Analysis include upstream, midstream and downstream. Since our inception in the year 1995, we, “ Orbit Research Associates Private Limited”, are one of the leading distributor, exporter, importer, service provider and a reputed buyer company of range of Analytical Instruments for surface chemistry and chemical engineering.
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