Hydrodynamics

This paper presents the research development on experiments of twophase flow hydrodynamic phenomena at Hanoi University of Science and Technology which include a small-scale test rig in vertical round tube configuration as well as the double-sensor conductivity probe for measuring of local two-phase flow parameters such as void fraction, phasic velocity, interfacial area concentration.

8p visnape 30-01-2023 1 0   Download

In this paper, effects of non-uniform clearance on TPJBs’ performances such as clearance profile, shaft locus, power loss, pad tilt angle, and pressure distribution are evaluated using an analytical model.

5p visirius 11-01-2023 6 1   Download

The influence of the mixture of water and alcohols on the solubility and properties of alginate and its calcium-induced gels is of interest for the food, wound care and pharmaceutical industries.

8p vihermione 06-01-2023 2 1   Download

Hyaluronan (HA) is frequently incorporated in eye drops to extend the pre-corneal residence time, due to its viscosifying and mucoadhesive properties. Hydrodynamic and rheological evaluations of commercial products are first accomplished revealing molecular weights varying from about 360 to about 1200 kDa and viscosity values in the range 3.7–24.2 mPa s.

12p vihermione 06-01-2023 14 1   Download

Dynamic light scattering (DLS), viscosity and surface tension (SFT) measurements were used to characterize influence of salts containing ions of Hofmeister series (Na2SO4, (NH4)2SO4, NaSCN, NH4SCN and NaCl) on the behaviour of hyaluronan in diluted solutions at a temperature range of 15–45 °C.

8p vihermione 06-01-2023 8 1   Download

Xylan is a biopolymer readily available from forest resources. Various modification methods, including oxidation with sodium periodate, have been shown to facilitate the engineering applications of xylan. However, modification procedures are often optimized for semicrystalline high molecular weight polysaccharide cellulose rather than for lower molecular weight and amorphous polysaccharide xylan.

7p viginny 30-12-2022 7 1   Download

Molecular dynamics modeling was applied to predict chitosan molecule conformations, the contour length, the gyration radius, the effective cross-section and the density in electrolyte solutions. Using various experimental techniques the diffusion coefficient, the hydrodynamic diameter and the electrophoretic mobility of molecules were determined.

13p viginny 30-12-2022 8 1   Download

Peak broadening in small columns is dominated by spreading in the extra column volume and not by hydrodynamic dispersion or mass transfer resistances. Computational fluid dynamics (CFD) permits to study the influence ofthese effects separately.

11p viginny 23-12-2022 5 2   Download

The international EU-SGTR and ARTIST projects investigated the transport of fission products in the form of aerosols during SGTR severe accidents. The major finding of the two projects was that there was significant retention of aerosols in the steam generator secondary side, and that the retention was increased by more than an order of magnitude if the secondary side of the steam generator was flooded with water.

14p vironald 15-12-2022 7 1   Download

This paper presents the study and use of the ROMS-SWAN coupled model in the COAWST system to calculate the hydrodynamic field in Hai Phong at a primitive level. The calculation gives quite good results when compared with the measured data. The results of this study are the basis for the application of the COAWST model system to calculate sediment transport.

10p vipagani 24-10-2022 1 1   Download

The low-lying terrain in downstream area of Sai Gon - Dong Nai river is mostly affected by natural disasters such as flooding, saltwater intrusion causing difficulties in process of socio-economic development. The project of building Vung Tau - Go Cong sea dyke with a length of 32 km was proposed to solve these problems, particularly creating a reservoir for storing water and preventing saltwater intrusion, expanding urban space, industrial parks, tourism, services, shelter for boats from the storm, reserving fresh water in the future.

13p vipagani 24-10-2022 2 1   Download

In this research, a numerical hydrodynamic and sediment transport model is developed for the analysis of reach-scale morphological evolution of the large sandy Red – Thai Binh river. This model can nowadays provide valuable information about the river evolution to river system managers.

3p vipagani 20-10-2022 3 1   Download

A new type of floating breakwater (FB) is proposed in this paper. Its hydrodynamic performance has been tested. The structure of the new breakwater named perforated semi-circular floating breakwater (SCFB) consists of two parts: a main body of a box-shaped base block and a semi-circular upper structure is perforated for the purpose of absorbing breaking and overtopping wave energy.

12p vimclaren 12-10-2022 1 1   Download

In this paper, multiple classification algorithms including support vector machine (SVM), random forest (RF), decision tree (DT), K-nearest neighbours (KNN), logistic regression, Gaussian, Bernoulli, multinomial Naïve Bayes, and linear discriminant analysis were executed on the seismic attributes for lithofacies prediction.

9p vibentley 08-09-2022 6 1   Download

(BQ) Ebook Mathematical methods of classical mechanics (Second edition): Part 2 presents the following content: Riemannian curvature; geodesics of left-invariant metrics on lie groups and the hydrodynamics of ideal fluids; symplectic structures on algebraic manifolds; contact structures; dynamical systems with symmetries; normal forms of quadratic hamiltonians; normal forms of hamiltonian systems near stationary points and closed trajectories; theory of perturbations of conditionally periodic motion, and kolmogorov's theorem;....

219p runordie6 10-08-2022 6 1   Download

Liver cancer is a major global health concern due to the steady increases in its incidence and mortality. Transcription factors, yes-associated protein (YAP) and WW domain-containing transcription regulator protein 1 (WWTR1, also known as TAZ) have emerged as critical regulators in human hepatocellular carcinoma (HCC) and cholangiocarcinoma (CC), the two major types of primary liver cancer.

11p vikolindagrabar 27-07-2022 1 1   Download

The paper compares the simulation and experiment results of the lubricating oil temperature in the connecting-rod big end bearing. Simulating hydrodynamic lubrication for the connecting-rod big end bearing based on solving Reynolds equations, oil film thickness equations, load balancing equations and energy equations combined numerical lubrication simulation for the bearing by modeling thermal problems for oil films using finite element method.

6p vimelindagates 18-07-2022 3 1   Download

Bài viết Ứng dụng mô hình thủy văn EPA SWMM, sóng động lực phân tích mạng lưới thoát nước cho khu đô thị mới Lê Minh Xuân, huyện Bình Chánh, Tp. Hồ Chí Minh trình bày kết quả nghiên cứu ứng dụng mô hình EPA SWMM, thủy lực Hydrodynamic wave trong phân tích thủy văn, thủy lực của mạng lưới thoát nước tại Khu đô thị mới Lê Minh Xuân, Thành phố Hồ Chí Minh.

6p visherylsandber 04-07-2022 20 1   Download

In order to design of the slope protection structure, the wave parameters, fetch, water levers... are given to calculate the minimum thickness of upstream protection (USP), satisfying the sliding and overturning conditions on inclined slope. In this report, uplift stability condition would be examined in case of reservoir drawdown.

3p viabigailjohnson 10-06-2022 7 0   Download

: Dynamic light scattering and viscosimetric methods were used to study polypeptides including polyleucine, poly (γ -benzyl-L-glutamate), poly (α-L-glutamic acid), and polyproline II. Chain extension showing rod-like and flexible conformations occurred in poly(γ -benzyl-L-glutamate) and polyproline II solutions as these solutions were diluted in glacial acetic acid or in a mixed solvent of acetic acid and dichloromethane.

12p langthannam 29-12-2021 4 0   Download