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Adapting the Forchheimer equation for the flow of air through wheat straw beds
The paper presents the results of an experimental investigation of air pressure drop while flowing through wheat straw beds. According to Darcy?s law, the smaller the porosity of the bed is, the bigger the pressure drop will be. The investigation was conducted using three different porosities (or th...
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| Published in: | Thermal science 2016, Vol.20 (suppl. 2), p.463-470 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
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| container_end_page | 470 |
| container_issue | suppl. 2 |
| container_start_page | 463 |
| container_title | Thermal science |
| container_volume | 20 |
| creator | Doder, Djordjije Miljkovic, Biljana Stepanov, Borivoj Pesenjanski, Ivan |
| description | The paper presents the results of an experimental investigation of air
pressure drop while flowing through wheat straw beds. According to Darcy?s
law, the smaller the porosity of the bed is, the bigger the pressure drop
will be. The investigation was conducted using three different porosities (or
three bed densities), and for two different air flow rates. After determining
porosity (which is directly measurable), the permeability of straw could be
found. For high flow velocities, such as the velocity of air flowing through
a straw bale, the Forchheimer equation becomes more relevant as a correction
of Darcy?s law with inertial effects included. Otherwise, the permeability
tensor depends only on the geometry of the porous medium. With permeability
known, the Forchheimer equation coefficients can be easily estimated. These
results may be important for the future development of efficient biomass
combustion facilities. The measurement methods and facility characteristics
are described in more detail.
nema |
| doi_str_mv | 10.2298/TSCI151005030D |
| format | article |
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pressure drop while flowing through wheat straw beds. According to Darcy?s
law, the smaller the porosity of the bed is, the bigger the pressure drop
will be. The investigation was conducted using three different porosities (or
three bed densities), and for two different air flow rates. After determining
porosity (which is directly measurable), the permeability of straw could be
found. For high flow velocities, such as the velocity of air flowing through
a straw bale, the Forchheimer equation becomes more relevant as a correction
of Darcy?s law with inertial effects included. Otherwise, the permeability
tensor depends only on the geometry of the porous medium. With permeability
known, the Forchheimer equation coefficients can be easily estimated. These
results may be important for the future development of efficient biomass
combustion facilities. The measurement methods and facility characteristics
are described in more detail.
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pressure drop while flowing through wheat straw beds. According to Darcy?s
law, the smaller the porosity of the bed is, the bigger the pressure drop
will be. The investigation was conducted using three different porosities (or
three bed densities), and for two different air flow rates. After determining
porosity (which is directly measurable), the permeability of straw could be
found. For high flow velocities, such as the velocity of air flowing through
a straw bale, the Forchheimer equation becomes more relevant as a correction
of Darcy?s law with inertial effects included. Otherwise, the permeability
tensor depends only on the geometry of the porous medium. With permeability
known, the Forchheimer equation coefficients can be easily estimated. These
results may be important for the future development of efficient biomass
combustion facilities. The measurement methods and facility characteristics
are described in more detail.
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pressure drop while flowing through wheat straw beds. According to Darcy?s
law, the smaller the porosity of the bed is, the bigger the pressure drop
will be. The investigation was conducted using three different porosities (or
three bed densities), and for two different air flow rates. After determining
porosity (which is directly measurable), the permeability of straw could be
found. For high flow velocities, such as the velocity of air flowing through
a straw bale, the Forchheimer equation becomes more relevant as a correction
of Darcy?s law with inertial effects included. Otherwise, the permeability
tensor depends only on the geometry of the porous medium. With permeability
known, the Forchheimer equation coefficients can be easily estimated. These
results may be important for the future development of efficient biomass
combustion facilities. The measurement methods and facility characteristics
are described in more detail.
nema</abstract><cop>Belgrade</cop><pub>Society of Thermal Engineers of Serbia</pub><doi>10.2298/TSCI151005030D</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Thermal science, 2016, Vol.20 (suppl. 2), p.463-470 |
| issn | 0354-9836 2334-7163 |
| language | eng |
| recordid | cdi_proquest_journals_2429794468 |
| source | Publicly Available Content (ProQuest); IngentaConnect Journals |
| subjects | Air flow Biomass burning Flow velocity Measurement methods Permeability Porosity Porous media Pressure drop Tensors Wheat |
| title | Adapting the Forchheimer equation for the flow of air through wheat straw beds |
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