Flow, Turbulence and Combustion最新文献_第8页

On the Feasibility of a Self-adaptive Strategy for Hybrid RANS/LES Based on Physical Criteria and its Initial Testing on Low Reynolds Number Backward-Facing Step Flow 基于物理准则的混合RANS/LES自适应策略的可行性及其在低雷诺数后向阶跃流中的初步测试

IF 2 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-25 DOI: 10.1007/s10494-024-00583-x

Martin David, Mahitosh Mehta, Rémi Manceau

{"title":"On the Feasibility of a Self-adaptive Strategy for Hybrid RANS/LES Based on Physical Criteria and its Initial Testing on Low Reynolds Number Backward-Facing Step Flow","authors":"Martin David, Mahitosh Mehta, Rémi Manceau","doi":"10.1007/s10494-024-00583-x","DOIUrl":"10.1007/s10494-024-00583-x","url":null,"abstract":"<div><p>Hybrid RANS/LES methods can produce more reliable results than RANS with a reasonable computational cost. Thus, they have the potential to become the next workhorse in the industry. However, in continuous approaches, whether or not they depend on the grid step explicitly, the ability of the model to switch to a well-resolved LES depends on the mesh generated by the user, such that the results are user-dependent. The present paper proposes a self-adaptive strategy, in which the RANS and LES zones are determined using physical criteria, in order to mitigate the user influence. Starting from an initial RANS computation, successive HTLES are carried out and the mesh is refined according to the criteria. To demonstrate the feasibility of this strategy, the method is applied to the backward-facing step case with the Hybrid Temporal Large Eddy Simulation (HTLES) approach, but is suitable for any other hybrid approach. The results obtained show that the method reaches a fixed point after only a few simulations and significantly improves the predictions when compared to RANS, with no intervention from the user. Even though the process is still a long way from being applicable to a wide range of turbulent flows, this paper is a demonstrator of the applicability of this self-adaptive strategy.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"114 1","pages":"49 - 79"},"PeriodicalIF":2.0,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatiotemporal Characteristics of Turbulent Flows Around Partially Submerged Circular Cylinders 部分浸没圆柱体周围湍流的时空特征

IF 2 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-22 DOI: 10.1007/s10494-024-00598-4

Mark K. Israel, Karen Dow, Shawn P. Clark, Mark F. Tachie

{"title":"Spatiotemporal Characteristics of Turbulent Flows Around Partially Submerged Circular Cylinders","authors":"Mark K. Israel, Karen Dow, Shawn P. Clark, Mark F. Tachie","doi":"10.1007/s10494-024-00598-4","DOIUrl":"10.1007/s10494-024-00598-4","url":null,"abstract":"<div><p>This paper presents a time-resolved particle image velocimetry investigation of the spatiotemporal characteristics of the wake flow around a partially submerged horizontal circular cylinder with and without upstream ice cover. This study is applicable to offshore structures such as ice booms. In the experiments, the cylinder was submerged with 50% of its surface below the free surface and the Reynolds number was 10,000. A reference experiment was performed with the cylinder fully immersed in the uniform flow for comparison. Due to the absence of an upper shear layer, the recirculation length of the submerged cylinder is longer, but the turbulence levels are lower compared to the uniform case, and an upstream ice cover reduces the recirculation length and turbulence levels around the submerged cylinder compared to the open water case. The wake of the cylinders is highly anisotropic, regardless of boundary condition, with vertical fluctuating velocities being dominant over streamwise fluctuating velocities in the uniform case and vice versa in the submerged cases. In the uniform case, the turbulence production is maximum on the wake centerline, but in the submerged cases, the maximum turbulence production occurs within the shear layer. The frequency spectra of fluctuating velocities also showed that the wake of a submerged cylinder is characterized by multiple low, distinct frequencies indicative of a wide range of vortical structures, regardless of the upstream flow condition.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"114 Heat and Mass Transfer","pages":"995 - 1015"},"PeriodicalIF":2.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revisiting the Modelling of Mixing Time Scales for Lagrangian Filtered Density Function Methods 拉格朗日滤波密度函数方法混合时间尺度建模的再探讨

IF 2 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-22 DOI: 10.1007/s10494-024-00612-9

Sergio Gutiérrez Sánchez, Jacqueline Yang, Andreas Kronenburg, Thorsten Zirwes

{"title":"Revisiting the Modelling of Mixing Time Scales for Lagrangian Filtered Density Function Methods","authors":"Sergio Gutiérrez Sánchez, Jacqueline Yang, Andreas Kronenburg, Thorsten Zirwes","doi":"10.1007/s10494-024-00612-9","DOIUrl":"10.1007/s10494-024-00612-9","url":null,"abstract":"<div><p>Mixing models for multiple mapping conditioning (MMC) methods are revisited as some details of their implementation have not yet been assessed. We use simulations of scalar mixing in non-reacting homogeneous isotropic decaying turbulence (HIT) such that (1) key modelling parameters can be taken from the direct numerical simulations without incurring additional modelling uncertainties and (2) direct validation is possible. Variants of Curl’s model are studied and direct comparison is sought with the variants’ performances in the context of standard (intensive) and sparse (such as MMC) particle approaches for the modelling of the probability density function (PDF). The second aim is to show the relative importance of micro-mixing and spatial diffusion in the presence of differential diffusion. The results demonstrate that MMC approximates the correct relaxation towards Gaussian independent of the mixing model’s variant. This is different from the standard PDF approach that requires a clear spatial localization given by the computational mesh to achieve a similar outcome. This spatial localization is not needed in MMC as the MMC mixing model already employs a localization in reference space. Differential diffusion effects can, however, only be accurately predicted if not only mixing but also spatial transport accounts for the differences in the molecular diffusion term. It is insufficient to adjust the mixing time scales only and future MMC models may require adjustments for accurate prediction capabilities.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"114 2","pages":"585 - 615"},"PeriodicalIF":2.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10494-024-00612-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthetic Turbulence with Prescribed Probability Density Function and Application to Scalar Quantities Occurring in Reactive Flows 具有规定概率密度函数的合成湍流及其在反应流中标量的应用

IF 2 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-21 DOI: 10.1007/s10494-024-00614-7

Markus Klein

引用次数: 0

Turbulence Structure and Mixing in Strongly Stable Couette Flows over Thermally Heterogeneous Surfaces: Effect of Heterogeneity Orientation 热异质表面上强稳定库埃特流的湍流结构和混合：异质性方向的影响

IF 2 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-20 DOI: 10.1007/s10494-024-00593-9

Dmitrii Mironov, Peter Sullivan

{"title":"Turbulence Structure and Mixing in Strongly Stable Couette Flows over Thermally Heterogeneous Surfaces: Effect of Heterogeneity Orientation","authors":"Dmitrii Mironov, Peter Sullivan","doi":"10.1007/s10494-024-00593-9","DOIUrl":"10.1007/s10494-024-00593-9","url":null,"abstract":"<div><p>Direct numerical simulations (DNS) of plane Couette flows over thermally heterogeneous surfaces at bulk Reynolds number <span>(Re=10^4)</span> and bulk Richardson number <span>(Ri=0.25)</span> are performed. The focus of the present study (that extends previous work by the authors) is the effect of surface heterogeneity orientation on boundary-layer structure. The temperature of the upper and lower walls is either homogeneous or varies sinusoidally, where the temperature-wave crests are either normal or parallel to the mean flow (HETx and HETy cases, respectively). Importantly, the horizontal-mean surface temperature is the same in all simulations. The stratification is strong enough to quench turbulence over a homogeneous surface, but turbulence survives over heterogeneous surfaces. In all heterogeneous cases, both molecular diffusion and turbulence transfer momentum down the gradient of mean velocity. The total (turbulent plus diffusive) heat flux is down-gradient, but quasi-organized eddy motions generated by the surface thermal heterogeneity induce heat transfer up the gradient of the mean temperature. Comparative analysis of HETx and HETy cases shows that the configuration with the spanwise heterogeneity is more turbulent and more efficient in transporting momentum and heat vertically than its counterpart with the streamwise heterogeneity. Vertical profiles of mean fields and turbulence moments differ considerably between the HETx and HETy cases, e.g., the streamwise heat flux differs not only in magnitude but also in sign. A close examination of the second-order turbulence moments, vertical-velocity and temperature skewness, and the flow eddy structure helps explain the observed differences between the HETx and HETy cases. The implications of our DNS findings for modelling turbulence in stably-stratified environmental and industrial flows with surface heterogeneity are discussed.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"114 Heat and Mass Transfer","pages":"967 - 994"},"PeriodicalIF":2.0,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10494-024-00593-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep Reinforcement Learning for the Management of the Wall Regeneration Cycle in Wall-Bounded Turbulent Flows 基于深度强化学习的壁面有界湍流壁面再生循环管理

IF 2.4 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-15 DOI: 10.1007/s10494-024-00609-4

Giorgio Maria Cavallazzi, Luca Guastoni, Ricardo Vinuesa, Alfredo Pinelli

{"title":"Deep Reinforcement Learning for the Management of the Wall Regeneration Cycle in Wall-Bounded Turbulent Flows","authors":"Giorgio Maria Cavallazzi, Luca Guastoni, Ricardo Vinuesa, Alfredo Pinelli","doi":"10.1007/s10494-024-00609-4","DOIUrl":"10.1007/s10494-024-00609-4","url":null,"abstract":"<div><p>The <i>wall cycle</i> in wall-bounded turbulent flows is a complex turbulence regeneration mechanism that remains not fully understood. This study explores the potential of deep reinforcement learning (DRL) for managing the wall regeneration cycle to achieve desired flow dynamics. To create a robust framework for DRL-based flow control, we have integrated the <i>StableBaselines3</i> DRL libraries with the open-source direct numerical simulation (DNS) solver <i>CaNS</i>. The DRL agent interacts with the DNS environment, learning policies that modify wall boundary conditions to optimise objectives such as the reduction of the skin-friction coefficient or the enhancement of certain coherent structures’ features. The implementation makes use of the message-passing-interface (MPI) wrappers for efficient communication between the Python-based DRL agent and the DNS solver, ensuring scalability on high-performance computing architectures. Initial experiments demonstrate the capability of DRL to achieve drag reduction rates comparable with those achieved via traditional methods, although limited to short time intervals. We also propose a strategy to enhance the coherence of velocity streaks, assuming that maintaining straight streaks can inhibit instability and further reduce skin-friction. Our results highlight the promise of DRL in flow-control applications and underscore the need for more advanced control laws and objective functions. Future work will focus on optimising actuation intervals and exploring new computational architectures to extend the applicability and the efficiency of DRL in turbulent flow management.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"115 :","pages":"1291 - 1317"},"PeriodicalIF":2.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10494-024-00609-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transition in ICF Capsule Implosions ICF胶囊内爆中的过渡

IF 2 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-13 DOI: 10.1007/s10494-024-00607-6

Fernando F. Grinstein, Vincent P. Chiravalle, Brian M. Haines, Robert K. Greene, Filipe S. Pereira

{"title":"Transition in ICF Capsule Implosions","authors":"Fernando F. Grinstein, Vincent P. Chiravalle, Brian M. Haines, Robert K. Greene, Filipe S. Pereira","doi":"10.1007/s10494-024-00607-6","DOIUrl":"10.1007/s10494-024-00607-6","url":null,"abstract":"<div><p>Longstanding design and reproducibility challenges in inertial confinement fusion (ICF) capsule implosion experiments involve recognizing the need for appropriately characterized and modeled three-dimensional initial conditions and high-fidelity simulation capabilities to predict transitional flow approaching turbulence, material mixing characteristics, and late-time quantities of interest—e.g., fusion yield. We build on previous coarse graining simulations of the indirect-drive national ignition facility (NIF) cryogenic capsule N170601 experiment-a precursor of N221205 which resulted in net energy gain. We apply effectively combined initialization aspects and multiphysics coupling in conjunction with newly available hydrodynamics simulation methods, including directional unsplit algorithms and low Mach-number correction-key advances enabling high fidelity coarse grained simulations of radiation-hydrodynamics driven transition. Our presentation includes discussion of the capsule initialization and implosion dynamics, analysis of the vorticity production budget, transition signatures, quantities of interest—late-time ion temperature and fusion-neutron yield, numerical uncertainty quantification, and comparisons with NIF data.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"114 Heat and Mass Transfer","pages":"801 - 825"},"PeriodicalIF":2.0,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10494-024-00607-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study of the Transition to Turbulence in a Bed of 67 Spherical Pebbles 67个球形卵石床向湍流过渡的研究

IF 2 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-12 DOI: 10.1007/s10494-024-00604-9

David Reger, Elia Merzari, Tri Nguyen, Yu-Hsiang Lan, Paul Fischer, Yassin Hassan

{"title":"A Study of the Transition to Turbulence in a Bed of 67 Spherical Pebbles","authors":"David Reger, Elia Merzari, Tri Nguyen, Yu-Hsiang Lan, Paul Fischer, Yassin Hassan","doi":"10.1007/s10494-024-00604-9","DOIUrl":"10.1007/s10494-024-00604-9","url":null,"abstract":"<div><p>Packed beds are commonly found in many engineering systems and have been widely studied for decades. A relatively new packed bed system is the Pebble Bed Reactor, a type of generation-IV nuclear reactor. Unlike many of the packed beds encountered in chemical and process engineering applications, Pebble Bed Reactors are larger and operate at significantly higher Reynolds numbers. As a result of these differences, there is a very limited amount of information on the detailed flow physics that exist in these complex geometries. This work seeks to contribute to a growing database of flow data for Pebble Bed Reactor systems by performing Direct Numerical Simulations of the flow in an experimental bed of 67 pebbles for a range of conditions. Simulations are performed at a Prandtl number of 0.66 and Reynolds numbers from 300–600. These Reynolds numbers are chosen to gain additional knowledge on the spatial development of turbulence in these systems. Analysis of the Turbulent Kinetic Energy, turbulence anisotropy, and Turbulent Heat Flux is performed. Results demonstrate significant development of the TKE across the tested range of Reynolds numbers. Examination of both the TKE and THF reveal that development first occurs near the center of the bed and propagates radially as the flow moves further into the bed. Notable regions of negative production of turbulent kinetic energy are observed in regions where flow accelerates around pebble contact points. These regions are found to coincide with regions of 1-component turbulence.Kindly check and confirm, all authors email id is correctly identified.These are correct</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"114 Heat and Mass Transfer","pages":"765 - 799"},"PeriodicalIF":2.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flow Dynamics and Performance Enhancement of Drag-Type Savonius Wind Turbine with a Novel Elliptic-Shaped Deflector 新型椭圆导流板拖曳式Savonius风力机的流动动力学及性能增强

IF 2 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-11 DOI: 10.1007/s10494-024-00608-5

Esmaeel Fatahian, Farzad Ismail, Mohammad Hafifi Hafiz Ishak, Wei Shyang Chang

{"title":"Flow Dynamics and Performance Enhancement of Drag-Type Savonius Wind Turbine with a Novel Elliptic-Shaped Deflector","authors":"Esmaeel Fatahian, Farzad Ismail, Mohammad Hafifi Hafiz Ishak, Wei Shyang Chang","doi":"10.1007/s10494-024-00608-5","DOIUrl":"10.1007/s10494-024-00608-5","url":null,"abstract":"<div><p>The drag-type Savonius rotor, a type of vertical-axis wind turbine, is designed to capture wind energy and convert it into rotational torque. However, their efficiency is limited, which restricts their commercial viability. This inefficiency is primarily due to the negative torque produced by the returning blades, which results in minimal power output. This study examines the effect of the aspect ratio on a new elliptic-shaped deflector using three-dimensional (3D) computational fluid dynamics (CFD) modeling and an optimization approach. The aim of this novel deflector is to enhance the aerodynamic performance of the Savonius turbine by reducing negative torque during blade sweeping on the return side. Although there is extensive literature on elliptic-shaped bodies, there is a notable lack of research on the interaction between airflow over such a body used as a deflector and the Savonius rotor. This research uses an optimization methodology based on the design of experiments to determine the optimal design. Using the Taguchi method and analysis of variance, the number of blades is identified as the most significant factor, accounting for 77% of the rotor performance near the deflector. At a Tip Speed Ratio (λ) of 0.8, the optimal deflector achieves the highest average power coefficient of 0.34, representing a significant 42% improvement compared to the maximum average power coefficient without a deflector.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"114 2","pages":"643 - 675"},"PeriodicalIF":2.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalization Limits of Data-Driven Turbulence Models 数据驱动湍流模型的泛化极限

IF 2.4 3区工程技术

Flow, Turbulence and Combustion Pub Date : 2024-11-09 DOI: 10.1007/s10494-024-00595-7

Hannes Mandler, Bernhard Weigand

{"title":"Generalization Limits of Data-Driven Turbulence Models","authors":"Hannes Mandler, Bernhard Weigand","doi":"10.1007/s10494-024-00595-7","DOIUrl":"10.1007/s10494-024-00595-7","url":null,"abstract":"<div><p>Many industrial applications require turbulent closure models that yield accurate predictions across a wide spectrum of flow regimes. In this study, we investigate how data-driven augmentations of popular eddy viscosity models affect their generalization properties. We perform a systematic generalization study with a particular closure model that was trained for a single flow regime. We systematically increase the complexity of the test cases up to an industrial application governed by a multitude of flow patterns and thereby demonstrate that tailoring a model to a specific flow phenomenon decreases its generalization capability. In fact, the accuracy gain in regions that the model was explicitly calibrated for is smaller than the loss elsewhere. We furthermore show that extrapolation or, generally, a lack of training samples with a similar feature vector is not the main reason for generalization errors. There is actually only a weak correlation. Accordingly, generalization errors are probably due to a data-mismatch, i.e., a systematic difference in the mappings from the model inputs to the required responses. More diverse training sets unlikely provide a remedy due to the strict stability requirements emerging from the ill-conditioned RANS equations. The universality of data-driven eddy viscosity models with variable coefficients is, therefore, inherently limited.</p></div>","PeriodicalId":559,"journal":{"name":"Flow, Turbulence and Combustion","volume":"115 :","pages":"1059 - 1094"},"PeriodicalIF":2.4,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10494-024-00595-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0