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| 1 | Pore scale simulation of liquid and gas two-phase flow based on digital core technology显示文摘Two-phase flow in two digital cores is simulated by the color-gradient lattice Boltzmann method.This model can be applied totwo-phase flow with high-density ratio(on order of 1000).The first digital core is an artificial sandstone core,and itsthree-dimensional gray model is obtained by Micro-CT scanning.The gray scale images are segmented into discrete phases(solid particles and pore space) by the Otsu algorithm.The second one is a digital core of shale,which is reconstructed usingMarkov Chain Monte Carlo method with segmented SEM scanning image as input.The wettability of solid wall and relativepermeability of a cylindrical tube are simulated to verify the model.In the simulations of liquid and gas two phase flow in digital cores,density ratios of 100,200,500 and 1000 between liquid and gas are chosen.Based on the gas distribution in the digital core at different times,it is found that the fingering phenomenon is more salient at high density ratio.With the density ratioincreasing,the displacement efficiency decreases.Besides,due to numerous small pores in the shale,the displacement efficiency is over 20% less than that in the artificial sandstone and the difference is even about 30% when density ratio is greaterthan 500.As the density ratio increases,the gas saturation decreases in big pores,and even reaches zero in some small pores orbig pores with small throats.Residual liquid mainly distributes in the small pores and the edge of big pores due to the wettability of liquid.Liquid recovery can be enhanced effectively by decreasing its viscosity. | ZHANG Lei KANG QinJun YAO Jun GAO Ying SUN ZhiXue LIU HaiHu VALOCCHI Albert J. | 2015 | Science China(Technological Sciences)2015，58，8： | 11 |
| 2 | Transport properties,upper critical field and anisotropy of Ba(Fe_(0.75)Ru_(0.25))_2As_2 single crystals显示文摘The temperature and angle dependent resistivity of Ba(Fe 0.75 Ru 0.25) 2 As 2 single crystals were measured in magnetic fields up to 14 T.The temperature dependent resistivity with the magnetic field aligned parallel to c-axis and ab-planes allow us to derive the slope of dH ab c2 /dT and dH c c2 /dT near T c yielding an anisotropy ratio Γ = dH ab c2 /dT/dH c c2 /dT ≈ 2.By scaling the curves of resistivity vs.angle measured at a fixed temperature but different magnetic fields within the framework of the anisotropic Ginzburg-Landau theory,we obtained the anisotropy in an alternative way.Again we found that the anisotropy(m c /m ab) 1/2 was close to 2.This value is similar to that in Ba0.6K0.4Fe2As2(K-doped Ba122) and Ba(Fe 0.92 Co 0.08) 2 As 2(Co-doped Ba122).This suggests that the 3D warping effect of the Fermi surface in Ru-doped samples may not be stronger than that in the K-doped or Co-doped Ba122 samples,therefore the possible nodes appearing in Ru-doped samples cannot be ascribed to the 3D warping effect of the Fermi surface. | XING Jie SHEN Bing ZENG Bin LIU JianZhong DING XiaXin WANG ZhiHe YANG Huan WEN HaiHu | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，12： | 2 |
| 3 | Multi-Wavelength Ultra-Weak Fiber Bragg Grating Arrays for Long-Distance Quasi-Distributed Sensing显示文摘Fiber Bragg grating(FBG)array,consisting of a number of sensing units in a single optical fiber,can be practically applied in quasi-distributed sensing networks.Serious signal crosstalk occurring between large-serial of identical FBGs,however,has limited the further increase in the number of sensing units,thus restricting applications only for short-distance sensing networks.To reduce the signal crosstalk,we design two novel types of 10-kilometer-long FBG arrays with 10000 equally spaced gratings,written on-line using a customized grating inscription system,which is affiliated to a drawing tower.Main factors causing signal crosstalk,such as spectral shadowing and multiple reflections,are firstly investigated in theory.Consistent with the theoretical findings,experimental results are proving that ultra-weak(the reflectivity of—40 dB)and multi-wavelength gratings of a number more than 10000 can be readily identified,with satisfied low crosstalk.The maximum attenuation of grating signal and minimum signal-to-noise ratio(SNR)in a single-wavelength array are 10.69 dB and 5.62 dB,respectively.As a comparison,by increasing the number of central wavelengths to three,the attenuation can be effectively reduced to 5.54dB and the minimum SNR has been improved to 8.14 dB.The current study significantly enhances the multiplexing capacity of FBG arrays and demonstrates promising potentials for establishing large-capacity quasi-distributed sensing networks. | Wenjing GAO Jianxia LIU Huiyong GUO Xin JIANG Shaofa SUN Haihu YU | 2022 | Photonic Sensors2022，12，2： | 1 |
| 4 | Droplet Formation in a T-Shaped Microfluidic Junction显示文摘 | Liu Haihu Zhang Yonghao | 2009 | Journal of applied physics2009，106，3： | 1 |
| 5 | Low temperature specific heat of 12442-type KCa2Fe4As4F2 single crystals显示文摘Low-temperature specific heat(SH)is measured for the 12442-type KCa2Fe4As4F2 single crystal under different magnetic fields.A clear SH jump with the height of?C/T|Tc=130 mJ mol-1 K-2 is observed at the superconducting transition temperature Tc.It is found that the electronic SH coefficient?γ(H)quickly increases when the field is in the low-field region below 3T and then considerably slows down the increase with a further increase in the field,which indicates a rather strong anisotropy or multi-gap feature with a small minimum in the superconducting gap(s).The temperature-dependent SH data indicate the presence of the T2 term,which supplies further information and supports the picture with a line-nodal gap structure.Moreover,the onset point of the SH transition remains almost unchanged under the field as high as 9 T,which is similar to that observed in cuprates,and places this system in the middle between the BCS limit and the Bose-Einstein condensation. | Teng Wang JiaNan Chu JiaXin Feng LingLing Wang XuGuang Xu Wei Li HaiHu Wen XiaoSong Liu Gang Mu | 2020 | Science China(Physics,Mechanics & Astronomy)2020，63，9： | 1 |
| 6 | Visualization of the electronic phase separation in superconducting K_(x)Fe_(2−y)Se_(2)显示文摘Type-II iron-based superconductors(Fe-SCs),the alkali-metal-intercalated iron selenide A_(x)Fe_(2−y)Se_(2)(A=K,Tl,Rb,etc.)with a superconducting transition temperature of 32 K,exhibit unique properties such as high Néel temperature,Fe-vacancies ordering,antiferromagnetically ordered insulating state in the phase diagram,and mesoscopic phase separation in the superconducting materials.In particular,the electronic and structural phase separation in these systems has attracted intensive attention since it provides a platform to unveil the insulating parent phase of type-II Fe-SCs that mimics the Mott parent phase in cuprates.In this work,we use spatial-and angle-resolved photoemission spectroscopy to study the electronic structure of superconducting K_(x)Fe_(2−y)Se_(2).We observe clear electronic phase separation of K_(x)Fe_(2−y)Se_(2) into metallic islands and insulating matrix,showing different K and Fe concentrations.While the metallic islands show strongly dispersive bands near the Fermi level,the insulating phase shows an energy gap up to 700 meV and a nearly flat band around 700 meV below the Fermi energy,consistent with previous experimental and theoretical results on the superconducting K_(1−x)Fe_(2)Se_(2)(122 phase)and Fe-vacancy ordered K_(0.8)Fe_(1.6)Se_(2)(245 phase),respectively.Our results not only provide important insights into the mysterious composition of phase-separated superconducting and insulating phases of K_(x)Fe_(2−y)Se_(2),but also present their intrinsic electronic structures,which will shed light on the comprehension of the unique physics in type-II Fe-SCs. | Yujie Chen Juan Jiang Haifeng Yang Pavel Dudin Alexey Barinov Zhongkai Liu Haihu Wen Lexian Yang Yulin Chen | 2021 | Nano Research2021，14，3： | 1 |
| 7 | Review of progress in shape-memory polymers 显示文摘 | Liu Changdeng Qin Haihu Mather P T | 2007 | Journal of Materials Chemistry2007，17，16： | 1 |
| 8 | Lat- tice Boltzmann Phase-Field Modeling of Thermocapillary Flows in a Confined Microchannel 显示文摘 | LIU Haihu Valocchi A J ZHANG Yonghao | 2014 | Journal of Compu- tational Physics2014，256，： | 1 |
| 9 | Droplet formation in microfluidic cross-junctions 显示文摘 | Liu Haihu Zhang Yonghao | 2011 | Physics of Fluids2011，23，08： | 1 |
| 10 | Numerical Simulation for Bioconvection of Unsteady Stagnation Point Flow of Oldroyd-B Nanofluid with Activation Energy and Temperature-Based Thermal Conductivity Past a Stretching Disk显示文摘A mathematical modeling is explored to scrutinize the unsteady stagnation point flow of Oldroyd-B nanofluid under the thermal conductivity and solutal diffusivity with bioconvection mechanism.Impacts of Joule heating and Arrhenius activation energy including convective boundary conditions are studied,and the specified surface temperature and constant temperature of wall(CTW)are discussed.The consequences of thermal conductivity and diffusivity are also taken into account.The flow is generated through stretchable disk geometry,and the behavior of non-linear thermal radiation is incorporated in energy equation.The partial differential equations governing the fluid flow in the structure is reduced into dimensionless nonlinear ODEs by applying suitable similarity variables.The obtained system of non-dimensional nonlinear ODEs is treated numerically with the help of bvp4c solver in Matlab under shooting algorithm.The impact of various prominent parameters on velocity profile,thermal profile,volumetric nanoparticle concentration and microorganism distribution is depicted in graphical form.The numerical outcomes for skin friction coefficient,heat transfer rate,Sherwood number as well as microorganism density number versus various parameters are listed in the tables.The results show that fluid velocity is reduced by increasing buoyancy ratio parameter,while the fluid flow increases with mixed convective parameter.The temperature profile is enhanced with the amount of nonlinear thermal radiation and temperature dependent thermal conductivity.Furthermore,concentration profiles of nanoparticles have opposite behavior for Brownian motion coefficient and thermophoresis diffusion parameter,and it is noticed that by varying Peclet number the microorganisms profile is declined.The proposed study is useful to control and optimize heat transfer in industrial applications. | Muhammad Sami Rashad Haihu Liu Shan Ali Khan | 2022 | Computer Modeling in Engineering & Sciences2022，，1： | 0 |
| 11 | Lattice Boltzmann Simulation of Droplet Generation in a Microfluidic Cross-Junction显示文摘Using the lattice Boltzmann multiphase model,numerical simulations have been performed to understand the dynamics of droplet formation in a microfluidic cross-junction.The influence of capillary number,flow rate ratio,viscosity ratio,and viscosity of the continuous phase on droplet formation has been systematically studied over a wide range of capillary numbers.Two different regimes,namely the squeezinglike regime and the dripping regime,are clearly identified with the transition occurring at a critical capillary number Cacr.Generally,large flow rate ratio is expected to produce big droplets,while increasing capillary number will reduce droplet size.In the squeezing-like regime(Ca≤Cacr),droplet breakup process is dominated by the squeezing pressure and the viscous force;while in the dripping regime(Ca>Cacr),the viscous force is dominant and the droplet size becomes independent of the flow rate ratio as the capillary number increases.In addition,the droplet size weakly depends on the viscosity ratio in both regimes and decreases when the viscosity of the continuous phase increases.Finally,a scaling law is established to predict the droplet size. | Haihu Liu Yonghao Zhang | 2011 | Communications in Computational Physics2011，9，5： | 0 |
| 12 | miR-339-3p promotes AT1-AA-induced vascular inflammation by upregulating NFATc3 protein expression in vascular smooth muscle cells显示文摘Vascular inflammation induced by angiotensin II-1 receptor autoantibody(AT1-AA)is involved in the occurrence and development of various cardiovascular diseases.miR-339-3p is closely related to the degree of vasodilation of aortic aneurysm and is also involved in the occurrence and development of acute pancreatitis.However,it is still unclear whether miR-339-3p influences AT1-AA-induced vascular inflammation.In this study,the role and mechanism of miR-339-3p in AT1-AA-induced vascular inflammation are studied.RT-PCR detection shows that the miR-339-3p levels in the thoracic aorta and serum exosomes of AT1-AA-positive rats are significantly increased.The miRwalk database predicts the mRNAs that miR-339-3p can bind to their 5′UTR.Subsequently,it is found that the number of genes contained in the T cell receptor pathway is high through KEGG analysis,and NFATc3 among them can promote the secretion of various inflammatory cytokines.AT1-AA-induced upregulation of miR-339-3p expression in vascular smooth muscle cells(VSMCs)can lead to a significant increase in NFATc3 protein level and promote vascular inflammation.Inhibition of miR-339-3p with antagomir-339-3p can significantly reverse AT1-AA-induced high expressions of IL-6,IL-1βand TNF-αproteins in rat thoracic aorta and VSMCs.That is,AT1-AA can upregulate the expression of miR-339-3p in VSMCs,and the increased miR-339-3p targets the 5′UTR of NFATc3 mRNA to increase the protein level of NFATc3,thereby aggravating the occurrence of vascular inflammation.These findings provide new experimental evidence for the involvement of miRNAs in regulating vascular inflammatory diseases. | Yang Li Yaolin Long Xiaoyan Zhi Haihu Hao Xiaohui Wang Huirong Liu Li Wang | 2023 | Acta Biochimica et Biophysica Sinica2023，55，2： | 0 |
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