Refutas Equation Calculator

Viscosity Blending Index (VBI):

 

Introduction

The Refutas Equation Calculator is a tool designed to calculate the Viscosity Blending Index (VBI) of two or more liquids. VBI is a critical parameter in industries like oil and petrochemicals, where the blending of different liquids with varying viscosities is common. This tool simplifies the calculation process using the Refutas Equation.

How to Use

  1. Input the viscosity values (v) of the liquids you want to blend.
  2. Click the “Calculate VBI” button.
  3. The calculator will compute the Viscosity Blending Index (VBI) for the given viscosity values.

Formula

The Viscosity Blending Index (VBI) is calculated using the Refutas Equation:

VBI = 14.534 * ln[ln(v + 0.8)] + 10.975

Example

Suppose you have two liquids with viscosities:

  • Liquid A: 10 cSt
  • Liquid B: 20 cSt
  1. Input the viscosity values:
    • Liquid A: 10
    • Liquid B: 20
  2. Click the “Calculate VBI” button.
  3. The calculator will display the VBI for the given viscosities.

FAQ’s

Q1. What is the significance of Viscosity Blending Index (VBI)?

A1. VBI is used to predict the viscosity of a blend of two or more liquids. It helps in optimizing and controlling the viscosity of the final product in various industries.

Q2. Can this calculator handle more than two liquids?

A2. No, this calculator is designed for two liquids. If you have more than two, you can calculate the VBI for pairs of liquids and then use those values for further blending.

Q3. What are the units for viscosity in this calculator?

A3. This calculator accepts viscosity values in centistokes (cSt).

Conclusion

The Refutas Equation Calculator simplifies the calculation of the Viscosity Blending Index, a crucial parameter for blending liquids with varying viscosities. This tool is valuable for industries involved in liquid blending processes, allowing for better control and optimization of the final product’s viscosity.

Leave a Comment