Expansion of Insoluble Gas Nucleus in Delayed Expandable Foam

Ji Xin Wang; Lian Gan Jin; Wei Chi

doi:10.4028/www.scientific.net/AMR.821-822.1402

Paper Titles

Physical and Mechanical Properties of Stitch-Bonded Fabrics
p.1386

The Application of Complex Number Method in Planar Mechanism Motion Analyses
p.1390

The Effects of Rotation and Revolution Speed Ratio on the Grinding Kinetics of Cement Clinker in Horizontal Planetary Ball Mill
p.1394

Study on Heat Distribution of Pans
p.1398

Expansion of Insoluble Gas Nucleus in Delayed Expandable Foam
p.1402

Mechanical Characteristic Analysis of Dredger Crane Based on ABAQUS
p.1406

Finite Element Simulation of the Orthogonal Cutting Based on Abaqus
p.1410

Numerical Simulation for Gas-Liquid Two-Phase Flow along the Borehole after Air Cutting
p.1414

Analysis of the Influences of Drilling Fluid Flow Velocity inside and outside the Drilling String on Drilling String Lateral Vibration Frequency
p.1418

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 821-822Expansion of Insoluble Gas Nucleus in Delayed...

Expansion of Insoluble Gas Nucleus in Delayed Expandable Foam

Abstract:

Delayed expandable foam (DEF) is a new material that can significantly extend the range of foam curtain in electromagnetic waves interference, fire extinguishing and pollution washdown, etc. This paper studied the expansion of insoluble gas nucleus (IGN) in supersaturated solution of DEF. The radius and volume of IGN as well as DEF was calculated using double membrane model of mass transfer. Results show that the size of IGN raises steadily over time meanwhile the bulk volume of DEF is nearly invariable when both initial radius r₀ and number density ψ of IGN are small enough. This is called the volume sensitivity effect. At this stage, the time delay reduces linearly with r₀ and the square root of ψ. Accordingly, the time delay of DEF expansion can be adjusted by setting initial radius and number density of IGN. This research can provide theoretical basis for DEF development.