Measurement of mass diffusion coefficients by digital moiré

Giuseppe Schirripa Spagnolo; Carla Simonetti; Lorenzo Cozzella

doi:10.1117/12.623136

11 October 2005 Measurement of mass diffusion coefficients by digital moiré

Giuseppe Schirripa Spagnolo, Carla Simonetti, Lorenzo Cozzella

Proceedings Volume 5958, Lasers and Applications; 59582Q (2005) https://doi.org/10.1117/12.623136
Event: Congress on Optics and Optoelectronics, 2005, Warsaw, Poland

Abstract

In order to measure small diffusion coefficients of miscible fluids, in this paper we propose an improved version of digital projection moiré. The system uses a simple and flexible fringe generator realized by means of a video projector with a modification of projection optic. The fringe patterns are projected on the bottom of a ground glass plate. The phase object (diffusion cell) is placed in front of the ground glass (in other words, in front of the fringe pattern), which is imaged by a digital video camera. Grating patterns, during the evolution of diffusion phenomena, are captured by a CCD camera and stored in a computer at different times. With the aid of signal demodulating techniques, the images are processed to obtain the diffusion coefficients. The theoretical aspects of the method are presented and the relationship between the fringe shift and the diffusion coefficient is derived. Furthermore, we report some experiments conducted for demonstrating the usefulness of the system.

Citation Download Citation

Giuseppe Schirripa Spagnolo, Carla Simonetti, and Lorenzo Cozzella "Measurement of mass diffusion coefficients by digital moiré", Proc. SPIE 5958, Lasers and Applications, 59582Q (11 October 2005); https://doi.org/10.1117/12.623136

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Diffusion

Fringe analysis

Glasses

Refractive index

Projection systems

Video

CCD cameras

Show All Keywords

Keywords/Phrases

Search In:

Publication Years