0
Research Papers: Flows in Complex Systems

Experimental Investigation of Pressure Drop Through Ceramic Foams: An Empirical Model for Hot and Cold Flow

[+] Author and Article Information
S. Akbar Shakiba1

 Faculty of Mechanical Engineering, Multiphase and Reacting Flow Lab, K. N. Toosi University of Technology, Pardis St., Molasadra St., vanaqe sq., Tehran 43344-19991, IranShakibaesfahani@gmail.com

R. Ebrahimi

 Faculty of Aerospace Engineering, Combustion and Propulsion Lab, K. N. Toosi University of Technology, 4th square of Tehranpas, VafadarSharghi St., Tehran 16569-83911, Iranrebrahimi@kntu.ac.ir

M. Shams

 Faculty of Mechanical Engineering, Multiphase and Reacting Flow Lab, K. N. Toosi University of Technology, Pardis St., Molasadra St., vanaqe sq., Tehran 43344-19991, Iranshams@kntu.ac.ir

1

Corresponding author.

J. Fluids Eng 133(11), 111105 (Nov 08, 2011) (10 pages) doi:10.1115/1.4005198 History: Received February 28, 2011; Accepted September 20, 2011; Revised September 20, 2011; Published November 08, 2011; Online November 08, 2011

Growing application and use of ceramic foams has intensified the necessity to determine a precise and inexpensive method for prediction of pressure drop through these materials. In this paper, a new experimental model is presented for pressure drop through ceramic foams. In order to measure pressure drop, a set up was made in which air flow rate and temperature varied. Effects of variation in temperature and flow velocity on the pressure drop were investigated through open-cell SiC and Al2O3 foams with different values of porosity and pore density. Results of this study revealed the leading role of parameters such as viscosity, porosity, density, velocity and mean hydraulic diameter of pores of foam. Since there are several parameters affecting the problem, dimensional analysis was adopted as a convenient approach. Euler number, porosity and two Reynolds numbers, one based on the pores’ diameter and the other one based on total bed length, have been shown to be important in the analysis. Finally, an empirical model is developed for the pressure drop which is based on dimensionless numbers.

FIGURES IN THIS ARTICLE
<>
Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

A sample of SiC foam

Grahic Jump Location
Figure 2

(a) A schematic view of experimental set up and (b) a real view of experimental set up

Grahic Jump Location
Figure 3

The elliptical shape of pores for three types of pore density

Grahic Jump Location
Figure 4

Pore size distribution for a 10 ppi, 78.5% -Al2O3 foam

Grahic Jump Location
Figure 5

Foam surface imaging; (a) index area selection (b) zoom of index area and measuring

Grahic Jump Location
Figure 6

Variation of pressure drop per unit length versus velocity for three kind of pore density

Grahic Jump Location
Figure 7

Variation of pressure drop per unit length versus velocity for two kind of foam with different porosity

Grahic Jump Location
Figure 8

Variation of pressure drop per unit length versus velocity; study on pore size effect: (a) 20 ppi, (b) 30 ppi

Grahic Jump Location
Figure 9

Variations of pressure drop versus temperature for 4 m/s velocity

Grahic Jump Location
Figure 11

Compare variation dimensionless numbers for foams with different porosity: (a) Al2 O3 foams, (b) SiC foams

Grahic Jump Location
Figure 12

(a) comparison of experimental results and prediction data of present study, (b) comparison of pressure drop prediction for foams presented by Dietrich [21] with their results

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In