No full text
Poster (Scientific congresses and symposiums)
modelling heat and mass transfer during convective drying of a building material
Kahlerras, Loubna; Belhamri, Azeddine; Fraikin, Laurent et al.
2014IDS 2014 19th International Drying Symposium
 

Files


Full Text
No document available.

Send to



Details



Abstract :
[en] The purpose of this study is to characterize experimentally the behaviour of a cement mortar during its convective drying. The work presented here focuses on mortars with water-to cement ratios (w/C) of 0, 5. The drying tests are realized in a convective dryer designed for the drying of small samples (0 - 8g). Experiences are realized with different conditions of drying air temperature (60, 90 and 130 °C) and velocity (2, 3 and 5 m/s) the results show the influence of temperature and velocity on drying curve. Mathematical models have been used for the description of drying curves. The exponential mathematical model seems the most adequate to describe the drying curves of cement mortars, with correlation coefficients changing with the air temperature and velocity and close to unity. The convective mass and heat transfer coefficients are determined from the experimental data. The results showed that both mass and heat transfer coefficients were affected by the air temperature and velocity. The convective mass transfer coefficient changed from 0.0232m/s at V=2m/s to 0.045m/s at V=5m/s, and from 0.055 m/s at 60°c to 0.023 at 130°c. Heat transfer coefficient changed from 14.767 w/m2°c at V=2m/s to 28.64 w/m2°c at V=5m/s and from 7.71 at 60° c to 14.77 at 130°c The temperature dependency of the two coefficients was expressed using an Arrhenius-type equation and related parameters were deduced
Disciplines :
Materials science & engineering
Author, co-author :
Kahlerras, Loubna ;  Université de Liège - ULiège > Doct. sc. ingé. (chim. appl. - Bologne)
Belhamri, Azeddine;  université de constantine > génie-climatique
Fraikin, Laurent ;  Université de Liège > Department of Chemical Engineering > Génie chimique - Procédés et développement durable
Courard, Luc  ;  Université de Liège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Léonard, Angélique  ;  Université de Liège > Department of Chemical Engineering > Génie chimique - Procédés et développement durable
Language :
English
Title :
modelling heat and mass transfer during convective drying of a building material
Alternative titles :
[en] modelling heat and mass transfer during convective drying of a building material
Publication date :
24 August 2014
Number of pages :
1
Event name :
IDS 2014 19th International Drying Symposium
Event organizer :
Laboratory of Control and Process Engineering (LAGEP - Chemical Engineering Departement of the University C. Bernard Lyon 1) and AFSIA (French Association for Drying in Agriculture and Industry).
Event place :
Lyon, France
Event date :
du 24 aout 2014 au 27 aout 2014
Audience :
International
Available on ORBi :
since 24 February 2014

Statistics


Number of views
85 (11 by ULiège)
Number of downloads
0 (0 by ULiège)

OpenCitations
 
0

Bibliography


Similar publications



Contact ORBi