https://sam.ensam.eu:443 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Fri, 12 Jun 2026 11:33:14 GMT 2026-06-12T11:33:14Z http://hdl.handle.net/10985/10032 Nouvelle méthode de détermination de la distribution de la tailles des pores d’un milieu poreux par l’injection d’un fluide à seuil MALVAULT, Guillaume; OUKHLEF, Aimad; RODRIGUEZ DE CASTRO, Antonio; CHAMPMARTIN, Stephane; AHMADI-SENICHAULT, Azita; AMBARI, Abdelhak La caractérisation des milieux poreux (M.P.) en termes de porosité, de surface spécifique, de distribution de tailles des pores etc. est un enjeu important pour de nombreuses filières industrielles : récupération assistée de pétrole, thermique du bâtiment, séquestration de CO2, stockage d'énergie ... Ainsi, les phénomènes de transports liés aux écouelments au sein des M.P. ont occupé et continuent à stimuler une forte activité de recherche aussi bien fondamentale qu'appliquée. Dans cette communication, nous présentons une méthode innovante qui s'appuie sur l'écoulement d'un fluide viscoplastique à seuil au travers d'un poreux permettant de scanner la distribution de taille de pores. Tue, 01 Jan 2013 00:00:00 GMT http://hdl.handle.net/10985/10032 2013-01-01T00:00:00Z MALVAULT, Guillaume OUKHLEF, Aimad RODRIGUEZ DE CASTRO, Antonio CHAMPMARTIN, Stephane AHMADI-SENICHAULT, Azita AMBARI, Abdelhak La caractérisation des milieux poreux (M.P.) en termes de porosité, de surface spécifique, de distribution de tailles des pores etc. est un enjeu important pour de nombreuses filières industrielles : récupération assistée de pétrole, thermique du bâtiment, séquestration de CO2, stockage d'énergie ... Ainsi, les phénomènes de transports liés aux écouelments au sein des M.P. ont occupé et continuent à stimuler une forte activité de recherche aussi bien fondamentale qu'appliquée. Dans cette communication, nous présentons une méthode innovante qui s'appuie sur l'écoulement d'un fluide viscoplastique à seuil au travers d'un poreux permettant de scanner la distribution de taille de pores. http://hdl.handle.net/10985/8455 Yield stress fluids method to determine the pore size distribution of a porous medium OUKHLEF, Aimad; CHAMPMARTIN, Stephane; AMBARI, Abdelhak In this paper a new method is presented in order to determine the pore size distribution in a porous medium. This original technique uses the rheological properties of some non-Newtonian yield stress fluids flowing through the porous sample. This technique is based on the capillary bundle model (like the other classical methods) which, despite its apparent simplicity, is capable of properly characterizing the percolating pore size distribution. Then this distribution can be simply obtained from the measurement of the total flow rate as a function of the imposed pressure gradient. The present technique is successfully tested analytically and numerically for usual pore size distributions such as the Gaussian mono and multimodal distributions, using Bingham and Casson fluids. The technique can also be extended to any yield stress fluid and any kind of distribution. Wed, 01 Jan 2014 00:00:00 GMT http://hdl.handle.net/10985/8455 2014-01-01T00:00:00Z OUKHLEF, Aimad CHAMPMARTIN, Stephane AMBARI, Abdelhak In this paper a new method is presented in order to determine the pore size distribution in a porous medium. This original technique uses the rheological properties of some non-Newtonian yield stress fluids flowing through the porous sample. This technique is based on the capillary bundle model (like the other classical methods) which, despite its apparent simplicity, is capable of properly characterizing the percolating pore size distribution. Then this distribution can be simply obtained from the measurement of the total flow rate as a function of the imposed pressure gradient. The present technique is successfully tested analytically and numerically for usual pore size distributions such as the Gaussian mono and multimodal distributions, using Bingham and Casson fluids. The technique can also be extended to any yield stress fluid and any kind of distribution. http://hdl.handle.net/10985/10239 Identification de la distribution de tailles de pores d'un milieu poreux par analyse fréquentielle OUKHLEF, Aimad; MALVAULT, Guillaume; CHAMPMARTIN, Stephane; AMBARI, Abdelhak Cette communication présente une nouvelle approche pour aider à la caractérisation de la topologie des milieux poreux en termes de distribution de tailles de pores (DTP). Cette technique repose sur l’analyse dynamique de l’écoulement oscillant d’un fluide newtonien (ou non newtonien) à travers le milieu poreux. Elle consiste en l’utilisation de la fonction de transfert hydrodynamique du milieu poreux et plus particulièrement en la caractérisation de son admittance complexe. Tue, 01 Jan 2013 00:00:00 GMT http://hdl.handle.net/10985/10239 2013-01-01T00:00:00Z OUKHLEF, Aimad MALVAULT, Guillaume CHAMPMARTIN, Stephane AMBARI, Abdelhak Cette communication présente une nouvelle approche pour aider à la caractérisation de la topologie des milieux poreux en termes de distribution de tailles de pores (DTP). Cette technique repose sur l’analyse dynamique de l’écoulement oscillant d’un fluide newtonien (ou non newtonien) à travers le milieu poreux. Elle consiste en l’utilisation de la fonction de transfert hydrodynamique du milieu poreux et plus particulièrement en la caractérisation de son admittance complexe. http://hdl.handle.net/10985/19438 Identification of the pore size distribution of a porous medium by yield stress fluids using Herschel-Bulkley model OUKHLEF, Aimad; AMBARI, Abdelhak; CHAMPMARTIN, Stephane In this paper, we present a new method to determine the pore-size distribution (PSD) in a porous medium. This innovative technique uses the rheological properties of non-Newtonian yield stress fluids flowing through the porous sample. In a first approach, the capillary bundle model will be used. The PSD is obtained from the measurement of the total flow rate of fluid as a function of the imposed pressure gradient magnitude. The mathematical processing of the experimental data, which depends on the type of yield stress fluid, provides an overview of the pore size distribution of the porous material. The technique proposed here was successfully tested analytically and numerically for usual pore size distributions such as the Gaussian mono and multimodal distributions. The study was conducted for yield stress fluids obeying the classical Bingham model and extended to the more realistic Herschel-Bulkley model. Unlike other complex methods, expensive and sometimes toxic, this technique presents a lower cost, requires simple measurements and is easy to interpret. This new method could become in the future an alternative, non-toxic and cheap method for the characterization of porous materials. Wed, 01 Jan 2020 00:00:00 GMT http://hdl.handle.net/10985/19438 2020-01-01T00:00:00Z OUKHLEF, Aimad AMBARI, Abdelhak CHAMPMARTIN, Stephane In this paper, we present a new method to determine the pore-size distribution (PSD) in a porous medium. This innovative technique uses the rheological properties of non-Newtonian yield stress fluids flowing through the porous sample. In a first approach, the capillary bundle model will be used. The PSD is obtained from the measurement of the total flow rate of fluid as a function of the imposed pressure gradient magnitude. The mathematical processing of the experimental data, which depends on the type of yield stress fluid, provides an overview of the pore size distribution of the porous material. The technique proposed here was successfully tested analytically and numerically for usual pore size distributions such as the Gaussian mono and multimodal distributions. The study was conducted for yield stress fluids obeying the classical Bingham model and extended to the more realistic Herschel-Bulkley model. Unlike other complex methods, expensive and sometimes toxic, this technique presents a lower cost, requires simple measurements and is easy to interpret. This new method could become in the future an alternative, non-toxic and cheap method for the characterization of porous materials.