Wall-to-bed (or wall-to-fluid) heat transfer issues in trickle bed reactors (TBR) has an important impact on operation and efficiency in this category of reactors. In this study, the hydrodynamic and thermal behavior of trickle bed reactors was simulated by means of computational fluid dynamics (CFD) technique. The multiphase behavior of trickle bed reactor was studied by the implementation of ...

One of the major industry problems is the flow boiling, where reaching to the critical heat flux (CHF) condition can lead to a temperature jump and damage of the systems. In the present study, the effects of a uniform change in tube diameter on subcooled flow boiling and CHF was numerically investigated. The Euler-Euler model was used to investigate the relationship between the two liquid and v...

objectives: to compare the thickness of the lateral wall of the maxillary sinus in individuals with and without teeth to determine if extraction of the teeth can lead to a significant reduction in the thickness of the maxillary sinus lateral wall or not. patients and methods: in a retrospective study on fifty patients with an edentulous space, the thickness of the lateral wall of the maxillary ...

background recently, assessment of the atrial motion and deformation indices obtained via doppler myocardial imaging (dmi) has been proposed as a new method of exploring the atrial function. objective our aim was to assess the right atrial (ra) regional function using myocardial velocities, strain, and strain rate imaging (sri) and compare it with the function of the inter-atrial septum (ias) a...

objectives to investigate the correlation between t2* values of different regions of interest (rois) in myocardium with the means of semi quantitatively estimating the myocardiac iron content in the thalassemia major patients. in the same setting we tried to design a model to predict t2* value of interventricular septum (septum) based on t2* values of other convenient rois in myocardium. method...

large capacity cylindrical tanks are used to store a variety of liquids. their satisfactoryperformance during earthquake is crucial for modern facilities. in present paper, the behavior of cylindricalconcrete tanks under harmonic excitation is studied using the finite element method. liquid sloshing, liquidviscosity and wall flexibility are considered and additionally excitation frequency, liqu...

Coastal areas and coastal communities are facing threats due to the impacts of climate change. Therefore, assessing their vulnerabilities potential for natural habitats contribute protecting is essential effective long-term planning, sustainability, resilient management. This study modeled mapped vulnerability using InVEST 3.9.1 model developed by Natural Capital Project Vulnerability explore r...

musculoskeletal tuberculosis accounts for 1-2% of all types of tuberculosis. tubercular abscess of the chest wall accounts for 1-5% of all cases of musculoskeletal tuberculosis. herein, we report a case of tubercular abscess of the chest wall. the occurrence of caries rib and cold abscess of the chest wall with concomitant pulmonary tuberculosis, and tubercular lympha-denitis of neck and medias...

The resistive wall mode ~RWM! poses a threat to many plasma confinement devices. The continuous rotation of the wall relative to the plasma makes it appear perfectly conducting, because of the skin effect, but this is ineffective if the perturbation locks to the wall. This raises the question of whether a nonuniformly rotating wall is more effective. In this paper we discuss the effect of such ...