Differential multiphase models for polydispersed suspensions and particulate solids

Phan‐Thien, N.; Chinh, Pham Duc

doi:10.1016/s0377-0257(97)90002-1

Cited by 140 publications

(77 citation statements)

References 28 publications

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“…The individual effect of crystal and bubbles was theoretically parameterized by Phan-Thien and Pham (1997) and later applied by Harris and Allen (2008) for the study of basaltic magmas from …”

Section: Three Phase Mixturesmentioning

confidence: 99%

The multiphase rheology of magmas from Monte Nuovo (Campi Flegrei, Italy)

et al. 2013

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We present a study of high-temperature, uniaxial deformation experiments of natural, partially-crystallized magma from the Monte Nuovo (1538 AD) trachytic eruption. The experiments were performed using a high-temperature uniaxial Geocomp LoadTrac II press at dry atmospheric conditions and under controlled deformation rates. Each experiment involved deforming cores of natural (i.e., crystal-and vesicle-bearing) scoriaceous samples isothermally (600 to 800° C) at constant displacement rates (CDR) corresponding to strain rates between 10 -7 and 10 -4 s -1 . Measured viscosities vary between 10 10 and 10 13 Pa s. The flow behavior of these complex natural materials are fully described by a simplified Herschel-Bulkely equation in terms of consistency K and flow index n. We estimate the combined effects of crystals and pores on the rheology of these multiphasesuspensions. Our results demonstrate that the presence of pores has a major impact on the rheological response of magmas and may produce a marked decrease of their viscosity. At the same time, the presence of pores leads to a strong decrease in the strength of the magma inducing local and temporal variation in the deformation regimes (ductile vs. brittle). Brittle failure was in fact observed at T=600°C and strain rates of 10 -5 s -1 and at T=800°C for the highest applied strain rate (10 -4 s -1 ), respectively. This study constitutes an important step toward the estimation of multiphase rheological evolution of Monte Nuovo magmas and toward the general understanding of the full complexities governing the dynamics of magma transport in natural systems.

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Section: Three Phase Mixturesmentioning

confidence: 99%

The multiphase rheology of magmas from Monte Nuovo (Campi Flegrei, Italy)

et al. 2013

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“…Numerous researchers (Krieger and Dougherty, 1959;Metzner, 1985;Kitano et al, 1981;Phan-Thien and Pham, 1997) have proposed empirical equations to describe viscoelasticities of solid particle suspensions. Most empirical equations are generally valid in either moderate or highly concentrated emulsions.…”

Section: Brief Backgroundmentioning

confidence: 99%

Determination of Viscoelastic Properties of Rice Porridge by the Non-Rotational Concentric Cylinder Method

Keawkaika¹,

Suzuki²,

Hagura³

2010

FSTR

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The viscoelastic properties of Japanese rice porridge were measured using a non-rotational concentric cylinder rheometer. The viscosity and shear modulus of rice porridge exponentially increased with an increase in cooked rice concentration (i.e., 10%, 30%, 50%, 70% and 97% rice porridges). A Mooney's type model can be used to reasonably describe the viscosity of rice porridge as a function of the solid volume fraction. Small rice grains made by polishing and grinding produced low viscosity and shear modulus rice porridges. Moreover, the viscosity and shear modulus of rice porridge increased rapidly after cooking owing to an increase in the rice grain volume with water adsorption.

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“…Several authors (14)(15)(16)(17) have proposed empirical equations to describe the storage and loss moduli of suspensions of rigid particles in a viscoelastic incompressible matrix. For example, Poslinski et al (14) proposed the following equation to describe the relative storage modulus (G R ) of polymer-thickened suspensions,…”

Section: Brief Backgroundmentioning

confidence: 99%

“…[13]- [16], it follows that: According to Eqs. [17]- [18], the moduli of blends of polymerthickened emulsions and suspensions at high frequencies can be predicted from the knowledge of the following quantities: volume fraction of solids in the blend (φ s ), volume fraction of oil in emulsion (φ o ), solids free basis, and moduli of the continuous phase of the blend.…”

Section: Viscoelastic Behavior Of Blends Of Polymer-thickened Emulsiomentioning

confidence: 99%

Linear Viscoelastic Behavior of Multiphase Dispersions

Pal

2000

Journal of Colloid and Interface Science

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Differential multiphase models for polydispersed suspensions and particulate solids

Cited by 140 publications

References 28 publications

The multiphase rheology of magmas from Monte Nuovo (Campi Flegrei, Italy)

The multiphase rheology of magmas from Monte Nuovo (Campi Flegrei, Italy)

Determination of Viscoelastic Properties of Rice Porridge by the Non-Rotational Concentric Cylinder Method

Linear Viscoelastic Behavior of Multiphase Dispersions

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