Abstract
Frost formation begins when humid air comes in contact with a cold surface kept below freezing temperature of water. Objective of the present study is to develop a numerical model which can predict frost formation parameters such as rate of frost growth, frost densification and to study effect of ambient conditions on these parameters. The one-dimensional pure implicit finite difference method is adopted for solving differential equations. Numerical code is written in MATLAB 2013. The proposed numerical model is validated against two independent published experimental data with 6.6 and 16.8% deviation. Effect of ambient parameters like wall temperature, ambient temperature, humidity and Reynolds number on frost growth and densification are investigated. Also effect of variable wall temperature and variable ambient temperature on frost growth rate is discussed.
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Abbreviations
- cp :
-
Specific heat at constant pressure
- Co:
-
Convergence criteria
- dh :
-
Characteristic length
- D:
-
Molecular diffusion coefficient
- h:
-
Heat transfer coefficient
- hm :
-
Mass transfer coefficient
- H:
-
Thickness of frost
- k:
-
Thermal conductivity
- L:
-
Latent heat
- Le:
-
Lewis number
- m:
-
Mass flux
- M:
-
Molecular weight
- Nu:
-
Nusselt number
- P:
-
Pressure
- Pr:
-
Prandtl number
- q:
-
Heat flux
- R:
-
Universal gas constant
- Re:
-
Reynolds number
- t:
-
Time
- T:
-
Temperature
- v:
-
Velocity
- x:
-
Space coordinate
- x’:
-
Distance from leading edge
- ε:
-
Porosity
- ρ:
-
Density
- τ:
-
Tortuosity factor
- ω:
-
Specific humidity
- a:
-
Air
- Cond:
-
Conduction
- Conv:
-
Convective
- d:
-
Diffused
- eff:
-
Effective
- fr:
-
Frost
- fs:
-
Frost surface
- i:
-
Ice
- ini:
-
Initial
- lat:
-
Latent
- sat:
-
Saturated
- sub:
-
Sublimation
- svi:
-
Saturated vapor over ice
- t:
-
Total
- th:
-
Contributed to frost layer growth
- v:
-
Water vapor
- w:
-
Wall
- \(\infty\) :
-
Ambient
- g:
-
Guessed value
- j:
-
Time coordinate
References
Y. Hayashi, A. Aoki, S. Adachi, K. Hori, Study of frost properties correlating with frost formation types. J. Heat Transf. 99, 239–245 (1977)
P.L.T. Brian, R.C. Reid, Y.T. Shah, Frost deposition on cold surfaces. Int. J. Heat Mass Transf. 9(3), 375–380 (1970)
B.W. Jones, J.D. Parker, Frost formation with varying environmental parameters. J. Heat Transf. 97, 255–259 (1975)
Y.X. Tao, R.W. Besant, K.S. Rezkallah, A mathematical model for predicting the densification and growth of frost on a flat plate. Int. J. Heat Mass Transf. 36, 353–363 (1993)
R. Le Gall, M. Grillot, C. Jallut, Modeling of frost growth and densification. Int. J. Heat Mass Transf. 40, 3177–3187 (1997)
M. Fossa, G. Tanda, Study of free convection frost formation on a vertical plate. Exp. Therm. Fluid Sci. 26, 661–668 (2002)
B. Na, R.L. Webb, New model for frost growth rate. Int. J. Heat Mass Transf. 47(5), 925–936 (2004)
Y.B. Lee, S.T. Ro, Analysis of the frost growth on a flat plate by simple models of saturation and supersaturation Exp. Therm. Fluid Sci. 29, 685–696 (2005)
K.-H. Kim, H.-J. Ko, K. Kim, Y.-W. Kim, K.-J. Cho, Analysis of the frost growth on a flat plate by simple models of saturation and supersaturation. Appl. Therm. Eng. 29, 2072–2079 (2009)
M. Kandula, Frost growth and densification in laminar flow over flat surfaces. Int. J. Heat Mass Transf. 54, 3719–3731 (2011)
C. Hermes, An analytical solution to the problem of frost growth and densification on flat surfaces. Int. J. Heat Mass Transf. 55, 7346–7351 (2012)
R.F. Barron, L.S. Han, Heat and mass transfer to a cryosurface in free convection. J. Heat Transf. 87(4), 499–506 (1965)
R. Ostin, S. Anderson, Frost growth parameters in a forced air stream. Int. J. Heat Mass Transf. 34(4/5), 1009–1017 (1991)
Q. Kaiyang, S. Komori, Y. Jiang, Local variation of frost layer thickness and morphology. Int. J. Therm. Sci. 45, 116–123 (2006)
M. Amini, A. Pishevar, M. Yaghoubi, Experimental study of frost formation on a fin-and-tube heat exchanger by natural convection. Int. J. Refrig. 46, 37–49 (2014)
H.W. Schneider, Equation of the growth rate of frost forming on cooled surfaces. Int. J. Heat Mass Transf. 21, 1019–1024 (1978)
M.M. Padki, S.A. Sherif, R.M. Nelsson, A simple method for modeling the frost formation phenomenon in different geometries. ASHRAE Trans. 95(2), 1127–1137 (1992)
H Auracher, Effective thermal conductivity of frost, in International Symposium of Heat and Mass Transfer in Refrigeration Cryogenics, Dubrovnik, pp. 285–302 (1986)
ASHRAE Handbook Fundamentals 2005, (ASHRAE, Atlanta, 2005) 5.2
D.M. Murphy, T. Koop, Review of the vapour pressures of ice and super cooled water for atmospheric applications. Q. J. R. Meteorol. Soc. 131, 1539–1565 (2005)
B. Na, R.L. Webb, A fundamental understanding of factors affecting frost nucleation. Int. J. Heat Mass Transf. 46, 3797–3808 (2003)
Acknowledgements
The support for this research work from the design department of INOXCVA, Kalol, Gujarat, India is gratefully acknowledged.
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Dave, T.R., Shah, M.I. & Singh, V.N. Numerical Modelling of Frost Formation of Flat Surface. J. Inst. Eng. India Ser. C 99, 531–538 (2018). https://doi.org/10.1007/s40032-017-0364-z
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DOI: https://doi.org/10.1007/s40032-017-0364-z