Pressure drop in packed beds of angular parallelepipeds, including the effects of particle interference
| Autor: | Elizabeth Trudel, William L.H. Hallett |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Packed bed
Pressure drop Range (particle radiation) Chemistry 020209 energy Applied Mathematics General Chemical Engineering Reynolds number Mineralogy 02 engineering and technology General Chemistry Mechanics 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Degree (temperature) Parallelepiped symbols.namesake Mass transfer 0202 electrical engineering electronic engineering information engineering symbols Particle 0210 nano-technology |
| Zdroj: | Chemical Engineering Science. 162:209-217 |
| ISSN: | 0009-2509 |
| DOI: | 10.1016/j.ces.2017.01.004 |
| Popis: | Pressure loss measurements are reported in packed beds of seven different shapes of angular parallelepiped, ranging from nearly cubical particles to thin flat chips, and compared with a number of available correlations, most of which underpredicted the pressure loss. All particle types when packed in the bed were found to overlap each other to some degree, and the extent of this was estimated from photographs, from which the average particle surface area effectiveness η was found to range from 0.69 to 0.85. The pressure loss correlation of Nemec and Levec (2005) was modified to include the effects of particle overlap, and values of η deduced by fitting to the measurements. The resulting values agreed well with those estimated from photographs, indicating that a pressure loss test can be used to assess particle overlap in a bed of known particle geometry. The range of Reynolds numbers covered was about 150–900. This is expected to be useful in assessing effective surface areas for heat and mass transfer and chemical reaction in packed beds. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect