Caged Molecular Fluorescence Velocimetry to measure meso-to micro-scale thermal flow fields /
A caged molecular fluorescence velocimetry (caged MFV) system has been developed to measure velocity profiles of thin meniscus flow fields commonly established in micro-scale thermocapillary devices such as micro heat pipe and capillary pumped loop (CPL). The system utilizes a microscope objective l...
| Main Author: | |
|---|---|
| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
2000.
|
| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | A caged molecular fluorescence velocimetry (caged MFV) system has been developed to measure velocity profiles of thin meniscus flow fields commonly established in micro-scale thermocapillary devices such as micro heat pipe and capillary pumped loop (CPL). The system utilizes a microscope objective lens, caged molecular fluorescence probes, Nd:YAG laser for UV light source, Ar-ion laser for 488 nm fluorescence pumping, and a color CCD camera to record a series of fluorescent images. Caged fluorescence probes have a specific characteristic that causes them to fluoresce only after they are exposed to UV light. The fluorescent image is seen like a thin thread in a fluid field. The thickness of a fluorescent image depends on the UV beam diameter that is adjusted as small as 20 æm. The flow velocity fields are analyzed using a time-averaged line tracking method. An example application has been made for three-dimensional thermocapillary driven flows, inside a 5-mm diameter pore. The developed MFV technique successfully shows the Lagrangian mapping of complicated flow fields driven by both thermocapillary stress and natural convection. |
|---|---|
| Item Description: | "Major subject: Mechanical Engineering". Vita. |
| Physical Description: | ix, 35 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references (leaves 32-34). |