New development in processing pendant droplet tensiometry data.

Area of Science:

• Physical Chemistry
• Fluid Dynamics
• Surface Science

Background:

• Pendant droplet tensiometry is crucial for measuring surface tension.
• Existing methods for analyzing droplet profiles can be complex and less reliable.
• The Bond number (Bo) is a key parameter relating surface tension and gravitational forces.

Purpose of the Study:

• To develop a novel, simplified method for calculating surface tension from pendant droplet profiles.
• To construct a database linking dimensionless droplet volumes (Vpen, Vcap) and the Bond number (Bo).
• To demonstrate the reliability and simplicity of the new method compared to existing techniques.

Main Methods:

• Governing equations of pendant droplet tensiometry were used to construct a database.
• The database links the dimensionless volume of pendant droplets (Vpen) and spherical caps (Vcap).
• The Bond number (Bo) was incorporated as an independent parameter within the database.

Main Results:

• A database correlating Vpen, Vcap, and Bo was successfully constructed.
• The method allows for the determination of Bo and surface tension from measured droplet profiles.
• Application to literature data confirmed the method's accuracy and ease of use.

Conclusions:

• The new database-driven method offers a reliable and simple approach to surface tension determination.
• This technique simplifies the analysis of pendant droplet profiles.
• It provides a valuable tool for researchers in fluid dynamics and surface science.