Experimental comparison of the ability of Dalton based and similarity theory correlations to predict water evaporation rate in different convection regimes
سال
: 2012
چکیده: This paper investigates the ability of two widely
used evaporation models: Dalton based correlations and
similarity theory results by comparing with experimental
measurements. A series of experimental investigations are
carried out over a wide range of water temperatures and air
velocities for 0.01 B Gr/Re2 B 100 in a rectangular heated
pool. The results show that for forced convection regime
satisfactory results can be achieved by using the modified
Dalton correlations, while, due to ripples appear on the water
free surface, similarity theory under predicts the evaporation
rate. In the free convection regime, Dalton based correlations
even with modification are not able to predict acceptable
results. For mixed convection regime, although both the
similarity theory and Dalton based correlations without
modification are not able to predict the mild non-linearity
behavior between water evaporation rate and vapor pressure
difference, but they obtain relatively satisfactory results. A
dimensionless correlation using the experimental data of all
convection regimes is proposed to cover different water
surface geometries and air flow conditions.
used evaporation models: Dalton based correlations and
similarity theory results by comparing with experimental
measurements. A series of experimental investigations are
carried out over a wide range of water temperatures and air
velocities for 0.01 B Gr/Re2 B 100 in a rectangular heated
pool. The results show that for forced convection regime
satisfactory results can be achieved by using the modified
Dalton correlations, while, due to ripples appear on the water
free surface, similarity theory under predicts the evaporation
rate. In the free convection regime, Dalton based correlations
even with modification are not able to predict acceptable
results. For mixed convection regime, although both the
similarity theory and Dalton based correlations without
modification are not able to predict the mild non-linearity
behavior between water evaporation rate and vapor pressure
difference, but they obtain relatively satisfactory results. A
dimensionless correlation using the experimental data of all
convection regimes is proposed to cover different water
surface geometries and air flow conditions.
کلیدواژه(گان): evaporation,simlarity theory,convection regimes
کالکشن
:
-
آمار بازدید
Experimental comparison of the ability of Dalton based and similarity theory correlations to predict water evaporation rate in different convection regimes
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| contributor author | A. Jodat | en |
| contributor author | محمد مقیمان | en |
| contributor author | مرتضی عنبرسوز | en |
| contributor author | Mohammad Moghiman | fa |
| contributor author | Morteza Anbarsooz | fa |
| date accessioned | 2020-06-06T13:08:58Z | |
| date available | 2020-06-06T13:08:58Z | |
| date issued | 2012 | |
| identifier uri | https://libsearch.um.ac.ir:443/fum/handle/fum/3343506 | |
| description abstract | This paper investigates the ability of two widely used evaporation models: Dalton based correlations and similarity theory results by comparing with experimental measurements. A series of experimental investigations are carried out over a wide range of water temperatures and air velocities for 0.01 B Gr/Re2 B 100 in a rectangular heated pool. The results show that for forced convection regime satisfactory results can be achieved by using the modified Dalton correlations, while, due to ripples appear on the water free surface, similarity theory under predicts the evaporation rate. In the free convection regime, Dalton based correlations even with modification are not able to predict acceptable results. For mixed convection regime, although both the similarity theory and Dalton based correlations without modification are not able to predict the mild non-linearity behavior between water evaporation rate and vapor pressure difference, but they obtain relatively satisfactory results. A dimensionless correlation using the experimental data of all convection regimes is proposed to cover different water surface geometries and air flow conditions. | en |
| language | English | |
| title | Experimental comparison of the ability of Dalton based and similarity theory correlations to predict water evaporation rate in different convection regimes | en |
| type | Journal Paper | |
| contenttype | External Fulltext | |
| subject keywords | evaporation | en |
| subject keywords | simlarity theory | en |
| subject keywords | convection regimes | en |
| journal title | Heat and Mass Transfer | fa |
| pages | 1397-1406 | |
| journal volume | 48 | |
| journal issue | 48 | |
| identifier link | https://profdoc.um.ac.ir/paper-abstract-1029133.html | |
| identifier articleid | 1029133 |