Development of acoustic cell to analyze viscoelastic properties of fluids

• Grant number: 07/02787-7
• Support Opportunities: Scholarships in Brazil - Master
• Start date: March 01, 2008
• End date: February 28, 2010
• Field of knowledge: Engineering - Biomedical Engineering - Bioengineering
• Principal Investigator: Antonio Adilton Oliveira Carneiro
• Grantee: Thiago Wellington Joazeiro de Almeida
• Host Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

The radiation acoustic force has been used as the method to examine physical properties in several areas. The vibro-acoustography is a technique that is being used to carry through analyzes of viscoelastic properties of materials. This technique consists of the force application acoustics modulated and focused in the interest region. The excited target will go to vibrate in the modulation frequency and the emitted sound is characteristic of the impedance mechanics of the way. This sound is detected using a dedicated hydrophone. In this project, we are considering a modification in this technique of vibro-acoustography replacing the hydrophone for a magnetic sensor of high sensitivity. In this in case, the radiation modulated acoustics is applied on a target magnetized immersed in the fluid in study. With this procedure, the static and dynamic displacement of the magnetic target (sphere) when acoustically excited will be able to be measured. Knowing the applied force and the displacement of the target, can be determined the parameters viscoelastic of the fluid.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

ALMEIDA, Thiago Wellington Joazeiro de. Development of acoustic cell to analyze viscoelastic properties of fluids. 2010. Master's Dissertation - Universidade de São Paulo (USP). Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (PCARP/BC) Ribeirão Preto.