0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Why is bulk density a more meaningful figure than particle density in terms of practical agriculture?
anya met
Why bulk density a more meaningful figure in terms of practical agriculture than particle density?
anya met
Loose bulk density?
Bulk density is a major physical property in designing the logistic system for biomass handling. The size, shape, moisture content, individual particle density, and surface characteristics are few factors affecting the bulk density. This research investigates the effects of true particle lengths ranging from 6 to 50 mm and moisture contents ranging from 8% to 60% wet basis (wb) on the bulk density of wheat straw and switchgrass. Three types of particle densities of straw and switchgrass measured were: a hollow particle density assuming a hollow cylindrical geometry, a solid particle density assuming a solid cylindrical geometry, and a particle density measured using a gas pycnometer at a gas pressure of 40 kPa. The bulk density of both loose-fill and packed-fill biomass samples was examined. The calculated wet and dry bulk density ranged from 24 to 111 kg m-3 for straw and from 49 to 266 kg m-3 for switchgrass. The corresponding tapped bulk density ranged from 34 to 130 kg m-3 for straw and 68 to 323 kg m-3 for switchgrass. The increase in bulk density due to tapping the container was from 10% for short 6-mm particles to more than 50% for long 50-mm particles. An equation relating the bulk density of stems as a function of moisture content, dry bulk density, and particle size was developed. After the validation of this bulk density equation, the relationship would be highly useful in designing the logistics system for large-scale transport of biomass to a biorefinery. The bulk density and particle density data of uniform particles would be important, if straw and switchgrass is used for pulping and paper making.
What is the difference between bulk density and density?
It is the difference between the density of a bulk sample, and the density of a homogenous piece of the material being measured.The difference between the density of a pile of gravel, and one stone from the pile, for example. the pile is less dense.Or styrofoam peanuts versus polystyrene plastic, the same material in a different form.Used more in engineering, for things like earthfill, coal hauling, etc.
What is the difference between true density and tapped density?
· Tap Density: The density of a powder when the volume receptacle is tapped or vibrated under specified conditions while being loaded. Each particle of a solid material has the same true density after grinding, milling or processing, but more geometric space is occupied by the material. In other words, the geometric density is less... approaching 50% less than true density if the particles are spherical. Handling or vibration of powdered material causes the smaller particles to work their way into the spaces between the larger particles. The geometric space occupied by the powder decreases and its density increases. Ultimately no further natural particle packing can be measured without the addition of pressure. Maximum particle packing is achieved. Under controlled conditions of tap rate, tap force (fall) and cylinder diameter, the condition of maximum packing efficiency is highly reproducible. This tap density measurement is formalized in the British Pharmacopoeia method for Apparent Volume, ISO 787/11 and ASTM standard test methods B527, D1464 and D4781 for tap density.· True Density: The true density of powders often differs from that of the bulk material because the process of comminution, or grinding will change the crystal structure near the surface of each particle and therefore the density of each particle in a powder. In addition, voids at the surface of a particle, into which liquids will not penetrate, can generate apparent volume which will cause serious errors when density is measured by liquid displacement. The pycnometer G-DenPyc 2900 from Gold APP Instruments are specifically designed to measure the true volume of solid materials by employing Archimedes' principle of fluid (gas) displacement and the technique of gas expansion. True densities are measured using helium gas since it will penetrate every surface flaw down to about one Angstrom, thereby enabling the measurement of powder volumes with great accuracy. The measurement of density by helium displacement often can reveal the presence of impurities and occluded pores which cannot be determined by any other method.
Why is bulk density a more meaningful figure than particle density in terms of practical agriculture?
anya met
Why bulk density a more meaningful figure in terms of practical agriculture than particle density?
anya met
Loose bulk density?
Bulk density is a major physical property in designing the logistic system for biomass handling. The size, shape, moisture content, individual particle density, and surface characteristics are few factors affecting the bulk density. This research investigates the effects of true particle lengths ranging from 6 to 50 mm and moisture contents ranging from 8% to 60% wet basis (wb) on the bulk density of wheat straw and switchgrass. Three types of particle densities of straw and switchgrass measured were: a hollow particle density assuming a hollow cylindrical geometry, a solid particle density assuming a solid cylindrical geometry, and a particle density measured using a gas pycnometer at a gas pressure of 40 kPa. The bulk density of both loose-fill and packed-fill biomass samples was examined. The calculated wet and dry bulk density ranged from 24 to 111 kg m-3 for straw and from 49 to 266 kg m-3 for switchgrass. The corresponding tapped bulk density ranged from 34 to 130 kg m-3 for straw and 68 to 323 kg m-3 for switchgrass. The increase in bulk density due to tapping the container was from 10% for short 6-mm particles to more than 50% for long 50-mm particles. An equation relating the bulk density of stems as a function of moisture content, dry bulk density, and particle size was developed. After the validation of this bulk density equation, the relationship would be highly useful in designing the logistics system for large-scale transport of biomass to a biorefinery. The bulk density and particle density data of uniform particles would be important, if straw and switchgrass is used for pulping and paper making.
Compared to a low-density spherical particle a high-density spherical particle of the same size will sink through water when?
More rapidly.
What is Bulk density?
Bulk density is defined as the weight per unit volume of material. Bulk density is primarily used for powders or pellets. The test can provide a gross measure of particle size and dispersion which can affect material flow consistency and reflect packaging quantity. Bulk Density ASTM D 1895 B
How do particle size and density affect the layering of lake beds?
The more the mass the greater the density so they settle down
What is denser sand or water?
Usually soil is more dense than water. Density is the weight of a substance per unit volume. The weight of one milliliter (1 cubic centimeter) of water is 1 gram, so it's density is 1 gram/cc. Common bulk densities for soil range from about 1.2 g/cc to 1.8 g/cc. Bulk density is the density of the soil, including both the soil particle and the pore space between the particles. Particle density for mineral soils (the density of a single particle of a grain of sand, for example) is generally about 2.6 g/cc
What is the difference between bulk density and density?
It is the difference between the density of a bulk sample, and the density of a homogenous piece of the material being measured.The difference between the density of a pile of gravel, and one stone from the pile, for example. the pile is less dense.Or styrofoam peanuts versus polystyrene plastic, the same material in a different form.Used more in engineering, for things like earthfill, coal hauling, etc.
Which is more dense diamond or iron?
Diamonds have a density of 3.51gm/cm3. Coal has a bank density of approximately 1346 kg/m³ (84 lb/ft³). Bulk density typically runs to 833 kg/m³ (52 lb/ft³).
What is a parameter and why are they useful?
Parameter is basically another word for "conditions", or "requirements". A parameter for good personal economy for instance is not to spend more than you earn.
Does warm air rise because of density?
Yes..Low density rises. As the particle gain more kinetic energy from being heated the density decreases as the particles move further apart causing a lower density. This could then form a convenction current but that is a different topic!
What is bulk density of Ordinary portland cement 53 grade?
1086 kg per m3 (bulk: not the press surface) 1184 kg per m3 (bulk: press surface but not bang) 1365 kg per m3 (press surface and bang 5 more time)
