Evaluation of Equations Approximating Thermodynamic and Transport Properties of Water, Steam Andair for Use in Cad of Drying Processes

Pakowski, Z.; Bartczak, Zdzislaw; Strumiłło, Czesław; Stenström, Stig

doi:10.1080/07373939108916708

Cited by 67 publications

(21 citation statements)

References 4 publications

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“…Thus, in future, the mathematical model for fissure prediction could be developed by the stress estimation combined with fractal analysis method. Mujumdar (1995) [45] and Pakowski et al (1991) [46] Thermal conductivity of air (W/m . K) )) 10 ( where T avg,K is the average temperature between inlet and outlet air temperatures (K) Mujumdar (1995) [45] and Pakowski et al (1991) [46] Specific heat of brown rice (J/kg .…”

Section: Stresses Inside Gbr Kernelmentioning

confidence: 99%

“…Mujumdar (1995) [45] and Pakowski et al (1991) [46] Thermal conductivity of air (W/m . K) )) 10 ( where T avg,K is the average temperature between inlet and outlet air temperatures (K) Mujumdar (1995) [45] and Pakowski et al (1991) [46] Specific heat of brown rice (J/kg . K) 1000 [47] where M is the moisture content of GBR (kg/kg dry basis) Density of brown rice (kg/m 3 ) ρ br = Maleekaew & Kiattiwat ( 001 [48] Latent heat of vaporization (kJ/kg) h fg = 2200…”

Section: Stresses Inside Gbr Kernelmentioning

confidence: 99%

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Modeling heat and mass transfer–induced stresses in germinated brown rice kernels during fluidized bed drying

et al. 2015

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A study of stress distribution inside a germinated brown rice (GBR) kernel during drying is important to understand the fissure formation of GBR and hence control the drying process in order to improve the quality of GBR. In this study, a finite element method performed in three dimensions in conjunction with the heat and mass balance of the drying system was developed to describe moisture, temperature and stress distributions inside GBR kernels during fluidized bed drying. The modelling was carried out using the couple of heat and mass transfer and validated with the experimental data at 90-150C.The results of moisture and temperature predictions agreed well with the experiments.During drying, tensile stress occurred at the layers close to surface while compressive stress occurred at the inner portion of a kernel. The tensile and compressive stresses increased to the highest value at about 30 s of drying, corresponding to the highest moisture gradient, and then decreased afterwards. The tensile and compressive stresses were higher at a higher drying temperature. These stress prediction results corresponded Downloaded by [New York University] at 01:36 31 July 2015 2 to the experiments which show more severity of GBR fissuring at higher drying temperatures.

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Section: Stresses Inside Gbr Kernelmentioning

confidence: 99%

Section: Stresses Inside Gbr Kernelmentioning

confidence: 99%

Modeling heat and mass transfer–induced stresses in germinated brown rice kernels during fluidized bed drying

et al. 2015

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“…Above physical properties of air are obtained from Pakowski, Bartczak, Strumilo, and Stenstrom (1991). The radiative heat transfer coefficient is calculated from the following equation:…”

Section: Aavmentioning

confidence: 99%

Modelling of far-infrared irradiation in paddy drying process

Meeso

Nathakaranakule

Madhiyanon

et al. 2007

Journal of Food Engineering

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“…Numerical grids for a one-forth cylindrical object for the governing equations. Table 2 Thermodynamics of air and water system [27,30] Equations Property Expression Units (55) c a c a = 1.00926 · 10 3 À 4.0403 · 10 À2 T + 6.1759 · 10 À4 T 2 À 4.097 · 10 À7 T 3 J/kg K (56) k a k a = 2.425 · 10 À2 + 7.889 · 10 À5 T À 1.790 · 10 À8 T 2 À 8.570 · 10 À12 T 3 W/m K (57) q a q a = 101.325/(0.287T abs ) kg/m 3 (58) l a l a = 1.691 · 10 À5 + 4.984 · 10 À8 T À 3.187 · 10 À11 T 2 + 1.319 · 10 À14 T 3 kg/m s (59)…”

Section: Solution Algorithmmentioning

confidence: 99%

Mathematical models based on heat transfer and coupled heat and mass transfers for rapid high temperature treatment in fluidized bed: Application for grain heat disinfestation

Madhiyanon

Techaprasan

Soponronnarit

2006

International Journal of Heat and Mass Transfer

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Evaluation of Equations Approximating Thermodynamic and Transport Properties of Water, Steam Andair for Use in Cad of Drying Processes

Cited by 67 publications

References 4 publications

Modeling heat and mass transfer–induced stresses in germinated brown rice kernels during fluidized bed drying

Modeling heat and mass transfer–induced stresses in germinated brown rice kernels during fluidized bed drying

Modelling of far-infrared irradiation in paddy drying process

Mathematical models based on heat transfer and coupled heat and mass transfers for rapid high temperature treatment in fluidized bed: Application for grain heat disinfestation

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