How to make a giant bubble
| Autor: | Justin Burton, Xinyi Jiang, Stephen Frazier |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Fluid Flow and Transfer Processes
chemistry.chemical_classification Soap bubble Materials science Bubble Fluid Dynamics (physics.flu-dyn) Computational Mechanics FOS: Physical sciences 02 engineering and technology Polymer Mechanics Physics - Fluid Dynamics Condensed Matter - Soft Condensed Matter 021001 nanoscience & nanotechnology 01 natural sciences Extensional definition chemistry Modeling and Simulation 0103 physical sciences Soft Condensed Matter (cond-mat.soft) Liquid bubble 010306 general physics 0210 nano-technology |
| Popis: | Using mixtures of soap, water, and long chain polymers, free-floating soap bubbles can be formed with volumes approaching 100 m$^3$. Here we investigate how such thin films are created and maintained over time. We show how the extensional rheology is the most important factor in creating the bubble, and how polydispersity in molecular weight of the solvated polymers leads to better performance at lower concentrations. Additionally, using IR absorption, we measure soap film thickness profiles and film lifetimes. Although the initial thickness mostly depends on the choice of detergent, polymers can dramatically increase film lifetime at high molecular weights and high concentrations, although such high concentrations can inhibit the initial film formation. Thus, the ideal concentration of polymer additives for making giant bubbles requires a robust viscoelastic rheology during extension, and is aided by long film lifetimes during gravitational drainage and evaporation. 10 pages, 8 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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