Estudio de los fenómenos de transporte termo-hidrodinámicos de no equilibrio en mezclas líquidas
Notice bibliographique
Résumé
In this doctoral thesis, an experimental study on the transport properties on liquid mixtures has been conducted. The molecular di usion coe cient, thermodi usion coe cient and Soret coe cient of several mixtures have been analyzed. The molecular di usion coe cient has been measured by the sliding symmetric tubes technique, while the thermodi usion coe cient has been determined using the thermogravitational technique. The Soret coe cient, on the other hand, has been calculated using the data obtained with these two experimental techniques.\n\t\t\t\t Di erent types of mixtures have been analyzed using these techniques. On the one hand, several binary mixtures, specifically mixtures of hydrocarbons, aqueous mixtures and polymer mixtures, have been studied. In the group of hydrocarbon mixtures, the thermodi usion, molecular di usion and Soret coefficients at 25 ºC of three equimolar and equimass normal alkane series have been determined (49 binary mixtures). The analysis of the obtained data has been used to develop three correlations for the prediction of the transport properties of the binary mixtures composed by these components. The first of these expressions, is a quantitative correlation which is used for the determination of the thermodi usion coe cient in normal alkane binary mixtures at any concentration. The second quantitative correlation developed, does the same thing but with the molecular di usion coe cient, using the data of the molecular mass di erence of the components and the dynamic viscosity of the mixture. The experimental data obtained for the Soret coefficient has been used to develop another quantitative correlation for the determination of this coefficient.\n\t\t\t\t In the case of aqueous mixtures, measurements of the transport properties in water-isopropanol mixture in the whole range of concentration at 25 ºC have been carried out. The experimental analysis of this mixture has also been done by other laboratories (Service de Chimie physique E.P. and Microgravity Resesarch Center, both from university of Brussels, and Department of Physics from university of Bayreuth), both in ground and microgravity conditions. The results obtained in this international collaboration work, can be considered as a consistent reference data for the mixtures which present a sign change in the Soret coe cient over their concentration range.\n\t\t\t\t For polymer mixtures, a combination of the sliding symmetric tubes and the gravimetric techniques has been used to study the water-polyacrylamide\n\t\t\t\t binary system in collaboration with FAST laboratory of Pierre et Marie Curie university. The analysis carried out using these two techniques has allowed the determination of the molecular di usion coe cient of the mixture throughout the concentration range of the three regimes that can be found in this mixture: concentrated, diluted and semi-diluted.\n\t\t\t\t Additionally, measurements of the thermodi usion coe cient in ternary hydrocarbon mixtures have been done. Two of these mixtures tetrahydronaphthalene-isobutylbenzene-ndodecane and toluene-nhexane-ndodecane) at several concentrations and 25 ºC have been analyzed. The data measured has been used to analyze and check the reliability degree of a correlation developed in a previous work. This correlation is able to predict the thermodiffusion coe cient in ternary mixtures using the data of their corresponding binary mixtures.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,002 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,001 | 0,001 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».