Fluids

Predicting the macroscopic permeability of porous media is critical in various scientific and engineering applications. This study proposes a novel model that combines Random Forest (RF) and rime-ice (RIME) optimization algorithm, denoted RIME-RF-RIME, to predict permeability based on six key features covering fluid phase dimensions, geometric characteristics, surrounding phase permeability, and media porosity.

14p viengfa 28-10-2024 1 1   Download

Calculating intra-aneurysm flow uses optical flow with computational fluid dynamics simulation on the numerical analysis. This is a new method to better understand the intravascular flow and aneurysm flow as well as factors related to the inflow vortex and the inflow jet which increase the rupture risk in patients with an aneurysm.

9p viling 11-10-2024 1 0   Download

In recent years, the prediction of the effective transport properties have received a great number of investigations. The present work is dedicated to determining the effective permeability of two-dimensional (2D) doubly porous materials made of an isotropic permeable solid matrix in which elliptical shaped pores of any size are embedded.

10p vibecca 01-10-2024 0 0   Download

In this report, we examine the unsteady Stokes equations with nonhomogeneous boundary conditions. As an application of a Carleman estimate, we first establish log type stabilities for the solution of the equations from either an interior measurement of the velocity, or a boundary observation depending on the trace of the velocity and of the Cauchy stress tensor measurements on a part of the boundary.

16p vibecca 01-10-2024 2 1   Download

This article employs the finite element method (FEM) to evaluate the local hydraulic losses in complex geometries discretized by unstructured mesh. The method is applied to the laminar flow of Newtonian fluid.

14p viyoko 01-10-2024 4 1   Download

In the present work, with the aim of thorough treatment of the used cutting fluid originated from of Samsung Electronics Vietnam Thai Nguyen factory, we propose the utilization of ZVI as catalyst for the secondary treatment stage.

9p vikwong 29-09-2024 2 1   Download

The article develops a novel framework for Multidisciplinary Design Optimization of aircraft wing. Practically, the study implements a high-fidelity fluid/structure analyses and accurate optimization codes to obtain the wing with best performance.

14p vifilm 24-09-2024 1 1   Download

Hepatitis B infection remains a global health problem, with progression to acute-chronic hepatitis, severe liver failure, and death making hepatitis B one of the most serious infections worldwide. The disease is most widely transmitted from an infected mother to her baby, after exposure to infected blood or body fluids or unsafe sexual contact.

6p vifaye 20-09-2024 2 1   Download

Although Cryptococcal infection is worldwide distribution, it is more seen in the immunocompromised patients. Cryptococcus neoformans is the most common central neurvous system fungal pathogen in HIV infected patients. In this paper we present an immunocompromised HIV infected case of C. neoformans meningitis with clinical features and imaging characteristics by MR image.

4p vifaye 20-09-2024 8 1   Download

The present work is to evaluate the performance of the RANS turbulence models for simulating regular wave propagation over a submerged breakwater using the open-source Computational Fluid Dynamics (CFD) software OpenFOAM.

15p vifaye 20-09-2024 6 2   Download

In this article, we introduce the application of 3D - FLAIR sequence without contrast enhancement on detecting abnormalities of cranial nerve pathology by presenting two cases, acute vestibular neuritis and facial nerve palsy. We suggest that 3D - FLAIR is the relatively useful sequence in detecting cranial nerve pathologies.

5p vinatisu 29-08-2024 3 0   Download

Meningoencephalitis is not a rare disease in children. However, eosinophilic meningitis due to Angiostrongylus cantonensis is unusual in pediatric population. We describe the case of a 12-year-old girl from central zone of Vietnam with eosinophilic meningitis.

5p vinatisu 29-08-2024 1 1   Download

Increased intra-abdominal pressure is common in patients with acute pancreatitis, and increased intra-abdominal pressure occurs due to inflammatory processes in the pancreas, peritoneal fluid, paralytic ileus, and fluid resuscitation. To evaluate the degree of increased intra-abdominal pressure in patients with acute pancreatitis and treatment prognosis according to the degree of increased intra-abdominal pressure.

7p visunati 23-08-2024 1 1   Download

Trong nghiên cứu này, một mô hình mô phỏng số động lực học chất lỏng (CFD - Computational Fluid Dynamics) được xây dựng dựa trên mô hình FPLE thực tế với hai động cơ 2 thì kép dung tích 25cc mỗi động cơ. Chiến lược khởi động piston dịch chuyển với hai vận tốc 0.32m/s và 0.64 m/s.

6p gaupanda047 12-08-2024 3 2   Download

Bài báo "Phát triển giảm chấn MRF kiểu dòng chảy tự thích nghi" nghiên cứu một cấu hình mới cho giảm chấn kiểu dòng chảy dùng chất lưu biến từ (Magnetorheological Fluid – MRF). Phương pháp thiết kế truyền thống thường sử dụng cuộn dây để tạo từ trường kích hoạt MRF, dẫn đến kết cấu tổng thể của hệ thống ứng dụng giảm chấn MRF khá phức tạp và tốn kém. Mời các bạn cùng tham khảo!

10p dathienlang1012 03-05-2024 9 1   Download

This paper describes an investigation of fluid flow through two tandem circular cylinders using Lattice-Boltzmann Method in direct numerical simulation. The diameter ratio of two circular cylinders, D1/D2 varies from 0.5 to 1.5, and spacing ratio (L/D2) varies from 1.5 to 10, whereas the Reynolds number of 100 is considered. The numerical model is well validated by comparing the results with those obtained in the literature.

8p dathienlang1012 03-05-2024 6 1   Download

In this study, we synthesized hydroxyapatite (HA) on polyvinyl alcohol/TiO2 (PVA/TiO2) in which TiO2 was prepared by the sol-gel method. HA was formed by immersing the membrane in the simulated body fluid (SBF) solution. We improved the mechanical strength of the membranes by adding glutaraldehyde (GA) combining with heat treatment to cross-link the polymer network.

14p dianmotminh02 03-05-2024 3 2   Download

The increasing use of Intelligent Transport System (ITS) can enable very close vehicle spacings which generally results in a net drag reduction for the resulting convoys. The majority of vehicle development has, to date, been for vehicles in isolation, thus the study of interaction effects is becoming increasingly important. The main objective of this research is to investigate the use of Computational Fluid Dynamics (CFD) for understanding convoy aerodynamics and to further the understanding of airflow interaction between vehicles via CFD.

154p runthenight07 01-03-2023 7 3   Download

This study aims to use CFD analysis of CT scan data from the nasal cavities of a range of older Asian males to investigate the impact of geometric variations between older nasal cavities on the airflow structures and airconditioning capacity of the nasal cavity. Air flow mechanisms, heat transfer rates and humidification efficacy are analysed in order to arrive at a more precise understanding of the role of nasal geometry in the presentation of respiratory ailments.

101p runthenight07 01-03-2023 8 3   Download

The purpose of this project is to enable the prediction of flow behaviour of concentrated slurries in the pipe loop under various laminar flow conditions using the fluid analogue to slurry and to find the suitable rheological model from the literature for the fluid analogue and tailings from the Sunrise dam. The major objective of the project is to develop a fluid analogue which will have similar rheological behaviour to that of the tailings from Sunrise dam so that it can be used as a test material to predict the flow behaviour of tailings in a pipe.

114p runthenight07 01-03-2023 7 3   Download