Nannan Wu

ORCID: 0000-0002-8617-1446
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About
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Research Areas
  • Thermodynamic properties of mixtures
  • Fluid Dynamics and Turbulent Flows
  • Spectroscopy and Quantum Chemical Studies
  • Crystallization and Solubility Studies
  • Aerodynamics and Acoustics in Jet Flows
  • X-ray Diffraction in Crystallography
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • Wind and Air Flow Studies
  • Heat Transfer Mechanisms
  • Molecular spectroscopy and chirality
  • Innovations in Concrete and Construction Materials
  • Material Dynamics and Properties
  • Particle Dynamics in Fluid Flows
  • Metal-Organic Frameworks: Synthesis and Applications
  • Grouting, Rheology, and Soil Mechanics
  • Combustion and Detonation Processes
  • Plant Water Relations and Carbon Dynamics
  • Glass properties and applications
  • Covalent Organic Framework Applications
  • Innovative Microfluidic and Catalytic Techniques Innovation
  • Innovative concrete reinforcement materials
  • Cyclone Separators and Fluid Dynamics
  • Spectroscopy and Chemometric Analyses
  • Luminescence Properties of Advanced Materials
  • Phase Equilibria and Thermodynamics

China University of Mining and Technology
2019-2024

Changsha University of Science and Technology
2023

Central South University
2021-2023

Guangzhou Maritime College
2022

Inner Mongolia University of Science and Technology
2012-2021

Nagoya University
2012-2014

Jilin University
2013

The structure and properties of water aqueous solutions have always been the focus attention. surface tension acetone were measured by using Raman spectra in different molecule environments, changes analyzed with hydrogen bonding mixtures. In this case, OH stretching bands fitted into three Gaussian components then assigned to hydrogen-bonded structures. Furthermore, it can be concluded that microstructure on binary mixture exhibited regularly additive acetone, indicating there showed...

10.3390/app9061235 article EN cc-by Applied Sciences 2019-03-24

In this study, our vibrational spectroscopic analysis is made on hydrogen-bonding between dimethyl sulfoxide and water comprises both experimental Raman spectra ab initio calculations structures of various sulfoxide/water clusters with increasing content. The peak position the v(S=O) stretching mode serves as a probe for monitoring degree water. addition, two modes, namely, CH3 symmetric asymmetric have been analysed under different concentrations. We relate computational results to...

10.1088/1674-1056/19/12/123101 article EN Chinese Physics B 2010-12-01

The effects of hydrogen bonds on the molecular structure water-tetrahydrofuran (H2O-THF), water-dimethyl sulfoxide (H2O-DMSO), and water-tetrahydrofuran-dimethyl (H2O-THF-DMSO) in binary aqueous solutions ternary were studied using Raman spectroscopy. results indicate that solution, addition THF DMSO will generate with water molecules, resulting changes peak positions S=O C-O bonds. Compared solutions, between THF, H2O are competitive, bond competition is susceptible to content. In addition,...

10.3390/molecules24203666 article EN cc-by Molecules 2019-10-11

Turbulent plane jets are prototypical free shear flows on which fundamental research can expand the overall understanding of turbulent flows. In this study, flow characteristics studied by means direct numerical simulation (DNS) based finite difference method. The effects initial conditions at jet exit (i.e. Reynolds number and velocity profile) spatial development scalar fields mainly investigated. Meanwhile instantaneous coherent structures, Q-criterion local minimum pressure, presented....

10.1299/jfst.8.247 article EN Journal of Fluid Science and Technology 2013-01-01

10.1007/s40996-024-01483-w article EN Iranian Journal of Science and Technology Transactions of Civil Engineering 2024-05-25

Significant changes observed in the tetrahydrofuran—water mixtures of different molar ratios have been determined extent intermolecular association via quantitative Raman experiment. The hydrogen bonding with addition tetrahydrofuran. surface tension are analyzed mixtures. result shows that strengthening between tetrahydrofuran and water contributes to weak solutions. correlation mole fractions is non-linear. This study provides an experimental basis for enriching theory multivariate aqueous...

10.1080/00387010.2021.1987271 article EN Spectroscopy Letters 2021-10-14

In this paper, the leakage and diffusion of liquefied hydrogen which is stored in high-pressure container were investigated safety arrangement cosmodrome focused on effects external flow above process was proposed. The phase transition at initial stage first analyzed by considering motion single particle group. Furthermore, rule under different conditions thoroughly examined CFD modelling. Through work, pressure, location, air-flow direction velocity are found to have great leaking hydrogen....

10.2298/tsci180411117w article EN Thermal Science 2019-01-01

Surface tension and Raman spectra containing hydrogen bonding in acetonitrile aqueous solutions with different mole ratios were obtained. Varied surface the mixed solution discussed. For this purpose, OH stretching bands fitted into three Gaussian components to which hydrogen-bonded water samples assigned. Furthermore, microstructures of binary analyzed. The results indicated that decreases dramatically enhancement bonds mixture. A spectroscopic method for studying macroscopic properties was...

10.1155/2019/7975237 article EN cc-by International Journal of Analytical Chemistry 2019-12-29

In the present study, flow characteristics of a spatially evolving plane jet are investigated, focusing on dynamics coherent structure (CS), transition, and evolution. Instantaneous statistical properties obtained by direct numerical simulation (DNS) discussed noting influence Reynolds number, analyzing velocity scalar fields. It is discovered that clearly dependent especially in near field. The evolution scale CS have strong dependence which shows significant effects transport momentum...

10.1299/jfst.2014jfst0013 article EN Journal of Fluid Science and Technology 2014-01-01

Turbulence plays an important role in the fields of heat and mass transfer enhanced chemical reaction. In order to explore effect grid-generated turbulence on flow transfer, this paper, three different fractal grid structures with same blocking ratio ?, effective mesh size Meff thickness tr= t max/t min (Case1: The cross-section is a triangle, Case2: inverted Case3:the square, Case4:no grid) without were simulated based large eddy simulation. aim simulation explain evolution characteristics...

10.2298/tsci181122108d article EN Thermal Science 2019-01-01

Abstract Ytterbium disilicate powders were synthesized by cocurrent chemical coprecipitation method. The influence of Si/Yb molar ratio and calcination temperature on compositions structures Yb 2 Si O 7 products investigated. formation mechanism thermal behavior precursor as well the phase evolution also discussed in depth. Results show that pure β-Yb with nanoscale size can be obtained from 1.1 after being calcinated at temperatures above 1200 ℃. is an amorphous polymer cross-linked...

10.21203/rs.3.rs-929960/v1 preprint EN cc-by Research Square (Research Square) 2021-10-05
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