Measurement of Thermophoretic Velocity in Surrounding Gas of Nitrogen or Carbon Dioxide

Mohd Azahari; Azwan Sapit; Mas Fawzi; Amir Khalid; Akmal Mohammed

doi:10.4028/www.scientific.net/AMM.554.686

Paper Titles

Numerical Simulation of High Reynolds Number Flow Structure in a Lid-Driven Cavity Using MRT-LES
p.665

Validate of Local Exhaust Ventilation (LEV) Performance through Analytical, Experimental and Computational Fluid Dynamic (CFD): A Case Study Model
p.670

Two-Sided Lid-Driven Cavity Flow at Different Speed Ratio by Lattice Boltzmann Method
p.675

Numerical Prediction of Thermal Effect on Flow Field around a High-Rise Building Model
p.680

Measurement of Thermophoretic Velocity in Surrounding Gas of Nitrogen or Carbon Dioxide
p.686

Simulation of the Airflow Characteristics inside Hard Disk Drive
p.691

A Verification and Validation Study of CFD Simulation of Wind-Induced Ventilation on Building with Single-Sided Opening
p.696

Derivation of Effective Ratio of Acoustic Impedance for Impacting Viscoelastic Slug (Standard Linear Solid Model) and Elastic Rod
p.701

Acoustic Energy Harvesting Using Flexible Panel and PVDF Films: A Preliminary Study
p.712

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 554Measurement of Thermophoretic Velocity in...

Measurement of Thermophoretic Velocity in Surrounding Gas of Nitrogen or Carbon Dioxide

Abstract:

Several experiments are conducted under the microgravity condition, which is achieved by a free-fall, for measuring the thermophoretic velocity in surrounding gas of nitrogen and carbon dioxide. PMMA spheres are used as measured particles, which are 2.91μm in mean diameter. The temperature gradient is 10 K/mm and the pressure is the range between 20 kPa and 100 kPa. Velocities of particles are individually measured during 0.25 s of the microgravity condition and the measurements are repeated in order to attain the accuracy by accumulating data. Comparison between obtained experimental results and theoretical predictions are done; the result for nitrogen is consistent with prediction, while a notable discrepancy is found for carbon dioxide. The disagreement is fixed by modifying the tangential momentum accommodation coefficient.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Applied Mechanics and Materials (Volume 554)

Pages:

686-690

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.554.686

Citation:

Cite this paper

Online since:

June 2014

Authors:

Mohd Azahari*, Azwan Sapit, Mas Fawzi, Amir Khalid, Akmal Mohammed

Keywords:

Microgravity Experiment, Tangential Momentum Accommodation Coefficient, Thermophoretic Velocity

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

* - Corresponding Author

References

[1] R. Dobashi, Z.W. Kong, A. Toda, N. Takahashi, M. Suzuki, and T. Hirano, Mechanism of smoke generation in a flickering pool flame, Proceeding of the 6th International Symposium on Fire Safety Science (2000), pp.255-264.

DOI: 10.3801/iafss.fss.6-255

Google Scholar

[2] S. Suzuki and R. Dobashi. Thermophoretic effect on soot particle behavior influence of particle morphology, 21st ICDERS (2007), p.239.

Google Scholar

[3] M. Suzuki, K. Maruko, K. Iwahara and W. Masuda. Accurate measurement of thermophoretic velocity under high temperature gradient, 6th International Symposium on Scale Modelling (2009), 1. 12. 1-1. 12. 8.

Google Scholar

[4] A. Hoshino, M. Suzuki, and W. Masuda. Numerical analysis on thermophoretic phenomenon in slip flow regime considering thermal stress effect, 21st International Symposium on Transport Phenomenon (2010), pp.464-465.

Google Scholar

[5] T. Suzuki, M. Suzuki and W. Masuda. Effect of water vapor to thermophoresis phenomenon, Proceeding of the 48th Symposium on Combustion (in Japanese) (2009), pp.448-449.

Google Scholar

[6] J.R. Brock. On the theory of thermal forces acting on aerosol, Journal of Colloid Science, Volume 17 (1962), pp.768-780.

DOI: 10.1016/0095-8522(62)90051-x

Google Scholar