Effect of Surface Dilatational Modulus on Foam Flow in a Porous Medium
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Yang Wang
Abstract
In order to clarify the role of surface dilatational property in foam flow in a porous medium, three systems were prepared: a system with low surface dilatational modulus and high surface tension, a system with low surface dilatational modulus and low surface tension, and a system with high surface dilatational modulus and low surface tension. By measuring the lamella number and pressure drop across the porous medium, it has been found that differing from flow in a capillary tube, a system with high surface dilatational modulus could achieve a high pressure drop in a porous medium. The conclusion drawn as to the reason is that bubbles with smaller diameter resulting from a structure induced breakup and high dilatational modulus are the main reasons. Flow experiments at 40°C also demonstrate the effect of surface dilatational modulus on the pressure drop.
Kurzfassung
Um die Rolle der Oberflächendilatation bei der Strömung von Schaum in einem porösen Medium zu untersuchen, wurden drei Systeme hergestellt: ein System mit niedrigem Oberflächen-Dilatationsmodul und hoher Oberflächenspannung, ein System mit niedrigem Oberflächen-Dilatationsmodul und geringer Oberflächenspannung und ein System mit hohem Oberflächen-Dilatationsmodul und geringer Oberflächenspannung. Durch die Messung der Lamellenzahl und des Druckabfalls über das poröse Medium konnte festgestellt werden, dass abweichend von der Schaumströmung in einer Kapillare das System mit einem hohen Oberflächen-Dilatationsmodul einen hohen Druckabfall in dem porösen Medium erzielt. Als die zwei wesentlichen Ursachen dafür werden Blasen mit kleinerem Durchmesser, die aus der durch die Struktur resultierenden Trennung entstehen, und der hohe Dilatationsmodul angesehen. Fließ-Experimente bei 40°C zeigen auch den Einfluss des Oberflächen-Dilatationsmoduls auf den Druckabfall.
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Articles in the same Issue
- Contents/Inhalt
- Contents
- Detergent/Cleaning
- Consumers' Comprehension of the EU Energy Label for Washing Machines
- Effect of Washing Conditions on Cleaning Action of Linear Alkylbenzene Sulfonate in Hard Water
- Biosurfactants/Novel Surfactants
- Surface Activity Study of Water-Soluble Silk Fibroin Prepared using Cocoons and Ca(NO3)2 · 4H2O
- Experimental Design Procedure for Optimization of Saponin Extraction from Glycyrrhiza glabra: A Biosurfactant for Emulsification of Heavy Crude Oil
- Studies on Emulsification Properties of Glycolipids Biosurfactants
- Synthesis and Characterization of Saturated Cardanol Sulfonate Salt Gemini Surfactant
- Physical Chemistry
- Effect of Surface Dilatational Modulus on Foam Flow in a Porous Medium
- Oil-Water Interfacial Tensions of Silica Nanoparticle-Surfactant Formulations
- Interactions of Cationic, Anionic and Nonionic Surfactants with Cresol Red Dye in Aqueous Solutions: Conductometric, Tensiometric, and Spectroscopic Studies
- Application
- Physicochemical Properties of Amino Acid Surfactants and Their Use in Dyeing with Natural Plant Dyes
- Short Communication
- Demulsification of Water-in-Heavy Crude Oil Emulsion using Amphiphilic Ammonium Salts as Demulsifiers
