Drag forces and heat transfer coefficients for spherical, cuboidal and ellipsoidal particles in cross flow at sub-critical Reynolds numbers

Richter, Andreas; Nikrityuk, Petr A.

doi:10.1016/j.ijheatmasstransfer.2011.09.005

Cited by 224 publications

(59 citation statements)

References 35 publications

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“…In absence of mass exchange phenomena (sublimation, evaporation, condensation, melting), the general form of the heat equation for a particle reads: (17) where c p denotes the specific heat capacity of the particle, T p,m the particle mean temperature, h t the mean heat transfer coefficient, T a the air temperature and T p,s the particle mean surface temperature.…”

Section: Heat Exchange Modelmentioning

confidence: 99%

“…Several correlations can be found in the literature 9,18,19 for the most simple particle shapes (disk, cylinder, cuboid, spheroid) but it is not possible to apply these correlations for arbitrary shapes and it is also important to note that these expressions cannot be directly plugged in Eq.18 since the definition of the Nusselt number is generally not based on the particle equivalent diameter. More recently, a general correlation based on the particle sphericity and crosswise sphericity has been introduced by Richter et al 17 . It reads:…”

Section: Heat Exchange Modelmentioning

confidence: 99%

See 1 more Smart Citation

Glaciated and mixed phase ice accretion modeling using ONERA 2D icing suite

Villedieu¹,

Trontin²,

Chauvin³

2014

6th AIAA Atmospheric and Space Environments Conference

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In the framework of HAIC European project, a capability for modeling glaciated and mixed-phase ice accretion has been added to IGLOO2D, the new ONERA 2D icing suite. A first set of models has been introduced for taking into account physical phenomena which are generally not considered for classical icing conditions: particle shape influence on the drag force, heat exchange between air and particles, melting and evaporation phenomena, complex particle interactions with dry and wetted walls, liquid film dynamics, influence of ice crystals on energy balance … To assess this new capability, test cases have been performed for mixed-phase ice accretion using results from the NASA-NRC experimental database 3,4 .

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Section: Heat Exchange Modelmentioning

confidence: 99%

Section: Heat Exchange Modelmentioning

confidence: 99%

Glaciated and mixed phase ice accretion modeling using ONERA 2D icing suite

Villedieu¹,

Trontin²,

Chauvin³

2014

6th AIAA Atmospheric and Space Environments Conference

View full text Add to dashboard Cite

show abstract

“…The drag coefficient C D of a single particle (spherical or nonspherical) can be derived from detailed resolved flow simulations [64][65][66] or from correlations such as Ganser [67] or Hölzer und Sommerfeld [48]. Due to its simplicity and general applicability the model by Hölzer und Sommerfeld [48] is popular and can be written as…”

Section: Drag Force Calculationmentioning

confidence: 99%

Numerical investigation of mixing and orientation of non-spherical particles in a model type fluidized bed

2014

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“…The surface of the granular matter « seen » by the hot fluid is determinant to characterize the interaction between fluid and grain, especially for non-spherical particles. The state of art related to that topic remains confused between the works established in the case of the forced convection [8,9] or the free convection [10,11]. In that context, two orientations were investigated, one located diagonally with respect to the fluid stream while one is straight with respect to the fluid stream.…”

Section: Experimental Set-upmentioning

confidence: 99%

Heat transfer rate within non-spherical thick grains

et al. 2017

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Abstract. The prediction of the internal heat conduction into non-spherical thick grains constitutes a significant issue for physical modeling of a large variety of application involving convective exchanges between fluid and grains. In that context, the present paper deals with heat rate measurements of various sizes of particles, the thermal sensors being located at the interface fluid/grain and into the granular materials. Their shape is designed as cuboid in order to control the surface exchanges. In enclosed coneshaped apparatus, a sharp temperature gradient is ensured from a hot source releasing the air stream temperature equal to about 400°C. Two orientations of grain related to the air stream are considered: diagonally and straight arrangements. The thermal diffusivity of the grains and the Biot numbers are estimated from an analytical solution established for slab. The thermal kinetics evolution is correlated to the sample granular mass and its orientation dependency is demonstrated. Consequently, a generalized scaling law is proposed which is funded from the effective area of the heat transfer at the grain-scale, the dimensionless time being defined from the calculated diffusional coefficients.

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Drag forces and heat transfer coefficients for spherical, cuboidal and ellipsoidal particles in cross flow at sub-critical Reynolds numbers

Cited by 224 publications

References 35 publications

Glaciated and mixed phase ice accretion modeling using ONERA 2D icing suite

Glaciated and mixed phase ice accretion modeling using ONERA 2D icing suite

Numerical investigation of mixing and orientation of non-spherical particles in a model type fluidized bed

Heat transfer rate within non-spherical thick grains

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