Flowability measurement of pulverized and granulated materials using vibrating tube method

Ishii, Katsunori; Suzuki, Masahiro; Segawa, Tomoomi; Kihara, Yoshiyuki; Yasuda, Masatoshi; Matsusaka, Shuji

doi:10.1016/j.apt.2010.04.002

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…Jiang et al (2006Jiang et al ( , 2009 invented the vibrating tube method for evaluating powder flowability, which is inspired from the micro-feeding of fine powders (Matsusaka et al, 1995(Matsusaka et al, , 1996. The method enables high-sensitivity measurement of powder flowability of small samples and the evaluation of both static and dynamic friction properties of various powders (Ishii et al, 2009(Ishii et al, , 2011a. Applying the vibrating tube method, Horio et al (2013) evaluated the powder flowability of pharmaceutical powders.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle shape on powder flowability of microcrystalline cellulose as determined using the vibration shear tube method

Horio

Yasuda

Matsusaka

2014

International Journal of Pharmaceutics

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Powder flowability of microcrystalline cellulose particles having different particle shapes, whose aspect ratios ranged from 1.8 to 6.4, was measured using the vibration shear tube method. Particles lubricated with magnesium stearate were also investigated in order to evaluate the effect of surface modification on powder flowability. Particles were discharged through a narrow gap between a vibrating tube edge and a flat bottom surface, where each particle experienced high shear forces, thus, overcoming adhesion and friction forces. Vibration amplitude was increased at a constant rate during measurement and the masses of the discharged particles were measured at consistent time intervals. Flowability profiles, i.e., the relationships between the mass flow rates of the discharged particles and their vibration accelerations, were obtained from these measurements. Critical vibration accelerations and characteristic mass flow rates were then determined from flowability profiles in order to evaluate static and dynamic friction properties. The results were compared with those obtained using conventional methods. It was found that angle of repose and compressibility were related to static and dynamic friction properties. Furthermore, it was found that particle aspect ratio more significantly affects powder flowability than does lubrication with magnesium stearate.

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Section: Introductionmentioning

confidence: 99%

Effect of particle shape on powder flowability of microcrystalline cellulose as determined using the vibration shear tube method

Horio

Yasuda

Matsusaka

2014

International Journal of Pharmaceutics

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“…Some of them are difficult to carry out, and are not suitable in terms of stress state. To counter these problems, a ring shear tester [13], an avalanche method [14], a vibratory feeder method [15], a vibrating capillary method [16][17][18][19][20], a twisted blade method [21], and an indentation method [22] were proposed.…”

Section: Introductionmentioning

confidence: 99%

“…The critical vibration acceleration is related to the static friction and the adhesiveness of particles and the mass flow rate is related to the dynamic friction of particles [19]; therefore, static and dynamic properties in powder flowability can be evaluated. This method uses a tube with a narrow opening to evaluate a small powder flow.…”

Section: Introductionmentioning

confidence: 99%

“…The vibrating capillary method can give the critical vibration acceleration that results in a powder flow, with the mass flow rate modeled as a function of vibration acceleration, hysteresis, and stability of the powder flow [17]. The critical vibration acceleration is related to the static friction and the adhesiveness of particles and the mass flow rate is related to the dynamic friction of particles [19]; therefore, static and dynamic properties in powder flowability can be evaluated. This method uses a tube with a narrow opening to evaluate a small powder flow.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Powder Flowability Using Vibration Shear Tube Method

Zainuddin¹,

Yasuda

Horio

et al. 2012

Part & Part Syst Charact

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The flowability of powders with different mass median diameters ranging from micrometers to nanometers was measured using the vibration shear tube method. In the measurement system used in this study, the powder was discharged through a narrow gap between a vibrating tube edge and a flat bottom surface, where each particle could experience high shear forces to overcome the adhesion and friction forces. The vibration amplitude was increased during the measurement, and the mass of particles discharged was measured at constant time intervals.From the relationship between the mass flow rate and the vibration acceleration, static and dynamic properties of the powders were evaluated using the critical vibration acceleration, characteristic mass flow rate, and gradient of mass flow rate. The correlation between the static and dynamic properties was studied in detail.

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“…This result showed the vibrating capillary method can have a high resolution in the flowability analysis. Ishii et al (2011a) have experimentally investigated the flowability of ZrO 2 and WO 3 particles by using the vibrating tube method. These particles had different concentrations, with mixtures made by coarse particles from 106 to 250 μm and fine particles under 45 μm.…”

Section: Powder Flow Under Vibration Forcementioning

confidence: 99%

A Review: Recent Progress on Evaluation of Flowability and Floodability of Powder

Ogata

2019

KONA

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Recent studies evaluating the flowability and floodability of cohesive powder under conditions of consolidation, mechanical force, vibrating force, fluid force, and floodability are reviewed. The ball indentation test is an effective method for evaluating the flowability of a small amount of cohesive powder at very low stress under consolidation conditions. The environmental conditions such as temperature and humidity play an important role in the flow of cohesive powder. With regard to cohesive powder flowing under mechanical force, the FT4 powder rheometer can evaluate the powder flowability using the total energy which is related to the shear stress on the impeller blade. The vibrating capillary method and the vibrating shear tube method are effective for the measurement of the flowability of strongly cohesive powder. The test using powder discharge by air flow can assess the flowability of cohesive powder which Carr's flowability index is an equivalent level by using mass flow rate and interstitial air pressure. Finally, the flushing of cohesive powder occurs when the interstitial air pressure and the void fraction are high. The pressure difference between the interstitial air pressure and the outside of an orifice are the dominant factors in the spouting of powder.

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Flowability measurement of pulverized and granulated materials using vibrating tube method

Cited by 8 publications

References 5 publications

Effect of particle shape on powder flowability of microcrystalline cellulose as determined using the vibration shear tube method

Effect of particle shape on powder flowability of microcrystalline cellulose as determined using the vibration shear tube method

Experimental Study on Powder Flowability Using Vibration Shear Tube Method

A Review: Recent Progress on Evaluation of Flowability and Floodability of Powder

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