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A GPU accelerated Boussinesq-type model for coastal waves

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Acta Oceanologica Sinica 2022年第9期41卷 158-168页

作者： Kezhao Fang Jiawen Sun guangchun song Gang Wang Hao Wu Zhongbo Liu State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian116024China National Marine Environmental Monitoring Center Dalian116023China Marine Geological Resources Survey Center of Hebei Province Qinhuangdao066001China College of Transportation Engineering Dalian Maritime UniversityDalian116026China

This study presents an efficient Boussinesq-type wave model accelerated by a single Graphics Processing Unit(GPU).The model uses the hybrid finite volume and finite difference method to solve weakly dispersive and nonlinear Boussinesq equations in the horizontal plane,enabling the model to have the shock-capturing ability to deal with breaking waves and moving shoreline properly.The code is written in CUDA C.To achieve better performance,the model uses cyclic reduction technique to solve massive tridiagonal linear systems and overlapped tiling/shared memory to reduce global memory access and enhance data reuse.Four numerical tests are conducted to validate the GPU implementation.The performance of the GPU model is evaluated by running a series of numerical simulations on two GPU platforms with different hardware configurations.Compared with the CPU version,the maximum speedup ratios for single-precision and double-precision calculations are 55.56 and 32.57,respectively.

关键词： Boussinesq model GPU speedup ratio coastal waves

Hydrate formation in oil–water systems: Investigations of the influences of water cut and anti-agglomerant

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Chinese Journal of Chemical Engineering 2020年第2期28卷 369-377页

作者： guangchun song Yuxing Li Wuchang Wang Kai Jiang Zhengzhuo Shi Shupeng Yao Shandong Province Key Laboratory of Oil-Gas Storage and Transportation Safety China University of PetroleumQingdao 266580China

To investigate the characteristics of hydrate formation in oil–water systems, a high-pressure cell equipped with visual windows was used where a series of hydrate formation experiments were performed from natural gas + diesel oil + water systems at different water cuts and anti-agglomerant concentrations. According to the temperature and pressure profiles in test experiments, the processes of hydrate formation under two kinds of experimental procedures were analyzed first. Then, based on the experimental phenomena observed through the visual windows, the influences of water cut and anti-agglomerant on the places of hydrate formation and distribution, hydrate morphologies and hydrate morphological evolvements were investigated. Hydrate agglomeration, hydrate deposition and hydrate film growth on the wall were observed in experiments. Furthermore, three different mechanisms for hydrate film growth on the wall were identified. In addition, the influences of water cut and anti-agglomerant on the induction time of hydrate formation were also studied.

关键词： Hydrates Formation Oil–water system Water cut Anti-agglomerant

Hydrate agglomeration modeling and pipeline hydrate slurry flow behavior simulation

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Chinese Journal of Chemical Engineering 2019年第1期27卷 32-43页

作者： guangchun song Yuxing Li Wuchang Wang Kai Jiang Zhengzhuo Shi Shupeng Yao Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of Petroleum

Dynamic modeling and numerical simulation of hydrate slurry flow behavior are of great importance to offshore hydrate management.For this purpose, a dynamic model of hydrate agglomeration was proposed in this paper.Based on population balance equation, the frame of the dynamic model was established first, which took both hydrate agglomeration and hydrate breakage into consideration.Then, the calculating methods of four key parameters involved in the dynamic model were given according to hydrate agglomeration dynamics.The four key parameters are collision frequency, agglomeration efficiency, breakage frequency and the size distribution of sub particles resulting from particle breakage.After the whole dynamic model was built, it was combined with several traditional solid–liquid flow models and then together solved by the CFD software FLUENT 14.5.Finally, using this method, the influences of flow rate and hydrate volume fraction on hydrate particle size distribution, hydrate volume concentration distribution and pipeline pressure drop were simulated and analyzed.

关键词： Hydrate Agglomeration Flow behavior Dynamic model Numerical simulation Population balance

浮式氢能储运过程中FLH2通道管外降膜流动的海上适应性强化机理

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化工进展 2024年第1期43卷 338-352页

作者：孙崇正李玉星许洁韩辉宋光春卢晓山东科技大学储能技术学院山东青岛266590 中国石油大学(华东)储运与建筑工程学院山东省油气储运安全重点实验室山东青岛266580 国家管网集团北京管道有限公司北京100101

随着海上风电和天然气制氢技术的发展,以氢能作为媒介的深海能源互联互通体系正不断完善。液态氢储运是实现海上氢能大规模运输和利用的有效方法,揭示海况条件下降膜流动机理是实现浮式氢能高效储运的关键。本文基于高速摄像系统和晃荡... 详细信息

随着海上风电和天然气制氢技术的发展,以氢能作为媒介的深海能源互联互通体系正不断完善。液态氢储运是实现海上氢能大规模运输和利用的有效方法,揭示海况条件下降膜流动机理是实现浮式氢能高效储运的关键。本文基于高速摄像系统和晃荡平台系统,同时基于耦合的VOF和Level Set两相流模型和动网格技术,采用浮式微观可视化实验和数值模拟相结合的方法,研究氢能储运过程中FLH_(2)(浮式氢气液化装置)换热通道管外降膜流动的海上适应性强化机理。研究结果表明,与常规光圆管、螺纹波管和方波管相比,波纹管管外降膜流动的液膜均匀性较好。在海况下波纹管间降膜流动流型稳定,并且均未出现管壁表面干涸的现象,因此在浮式氢气液化装置FLH2中推荐采用波纹管以强化其海上适应性。基于可视化实验和数值模拟结果,得到了降膜流动的流型演化规律,并拟合了波纹管外降膜流动的液膜厚度计算关联式。

关键词：氢气储运降膜流动海上适应性强化机理

Single-Atom Ce-N_(4)-C-(OH)_(2)Nanozyme-Catalyzed Cascade Reaction to Alleviate Hyperglycemia

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Research 2023年第4期2023卷 463-473页

作者： guangchun song Jia Xu Hong Zhong Qi Zhang Xin Wang Yitong Lin Scott PBeckman Yunbo Luo Xiaoyun He Jin-Cheng Li Kunlun Huang Nan Cheng Beijing Laboratory for Food Quality and Safety College of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China School of Mechanical and Materials Engineering Washington State UniversityPullmanWA 99164USA Faculty of Chemical Engineering Yunnan Provincial Key Laboratory of Energy Saving in PhosphorusChemical Engineering and New Phosphorus MaterialsKunming University of Science and TechnologyKunming 650000China Key Laboratory of Safety Assessment of Genetically Modified Organism(Food Safety) Ministry of AgricultureBeijing 100083China

The enzyme-mimicking catalytic activity of single-atom nanozymes has been widely used in tumor treatment.However,research on alleviating metabolic diseases,such as hyperglycemia,has not been reported.Herein,we found that the single-atom Ce-N_(4)-C-(OH)_(2)(SACe-N_(4)-C-(OH)_(2))nanozyme promoted glucose absorption in lysosomes,resulting in increased reactive oxygen species production in HepG2 cells.Furthermore,the SACe-N_(4)-C-(OH)_(2)nanozyme initiated a cascade reaction involving superoxide dismutase-,oxidase-,catalase-,and peroxidase-like activity to overcome the limitations associated with the substrate and produce•OH,thus improving glucose intolerance and insulin resistance by increasing the phosphorylation of protein kinase B and glycogen synthase kinase 3β,and the expression of glycogen synthase,promoting glycogen synthesis to improve glucose intolerance and insulin resistance in high-fat diet-induced hyperglycemic mice.Altogether,these results demonstrated that the novel nanozyme SACeN_(4)-C-(OH)_(2)alleviated the effects of hyperglycemia without evident toxicity,demonstrating its excellent clinical application potential.

关键词： diseases overcome initiated

海上平台超临界CO_(2)管道泄漏扩散规律实验研究

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中国海上油气 2024年第2期36卷 205-215页

作者：刘涛曹杨周伟胡毅然宋光春杨雅琪李彦尊韩辉李玉星中海油研究总院有限责任公司北京100028 中海石油(中国)有限公司北京研究中心北京100028 中国石油大学(华东) 山东青岛266580

CO_(2)封存是实现中国“双碳”目标的有效技术途径之一,海上CO_(2)封存通常依托海上油气平台管道回注,CO_(2)回注过程中可能发生泄漏而严重影响作业人员安全。以恩平15-1海上平台为研究对象,开展超临界CO_(2)泄漏扩散规律实验研究。通... 详细信息

CO_(2)封存是实现中国“双碳”目标的有效技术途径之一,海上CO_(2)封存通常依托海上油气平台管道回注,CO_(2)回注过程中可能发生泄漏而严重影响作业人员安全。以恩平15-1海上平台为研究对象,开展超临界CO_(2)泄漏扩散规律实验研究。通过缩比设计,搭建与恩平15-1相应的物理模型实验平台,利用相似理论和量纲分析方法,设计了超临界CO_(2)泄漏扩散参数,开展了海上平台管道CO_(2)在不同泄漏压力(1.5~3.0 MPa)、泄漏孔径(0.5~6.2 mm)、泄漏方向(水平、竖直、斜45°)及环境风速(0~0.5 m/s)下的相似模型实验,研究泄漏CO_(2)在平台上的扩散情况及浓度分布规律。结果表明:压力和环境风速的变化,会影响CO_(2)泄漏后的近场射流,但对其远场扩散的影响较小;CO_(2)浓度会在泄漏约20 s后达到峰值并保持稳定,不会随泄漏时间的增加而增大;泄漏口径会显著影响泄漏口轴向CO_(2)浓度的分布规律。研究结果为海上平台CO_(2)泄漏监测与安全防护设计提供了参考。

关键词：海上平台恩平15-1 CO_(2)回注 CO_(2)泄漏扩散规律物理模型实验量纲分析

适用于超临界CO_(2)管道瞬态过程模拟的软件评价

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油气储运 2024年第5期43卷 590-599页

作者：马馨苑欧阳欣朱建鲁陈俊文刘罗茜杨腾宋光春中国石油大学(华东)储运与建筑工程学院·山东省油气储运安全重点实验室国家管网集团科学技术研究总院分公司中国石油工程建设有限公司西南分公司

[目的]CO_(2)管道运行过程中涉及泄漏、投产等瞬态过程,由于CO_(2)具有特殊的物性和相特性,使得CO_(2)管道瞬态过程模拟难度较大,目前尚缺乏CO_(2)管道瞬态过程数值模拟软件的适应性评价。[方法]选取OLGA与Leda Flow两款主流瞬态模拟软... 详细信息

[目的]CO_(2)管道运行过程中涉及泄漏、投产等瞬态过程,由于CO_(2)具有特殊的物性和相特性,使得CO_(2)管道瞬态过程模拟难度较大,目前尚缺乏CO_(2)管道瞬态过程数值模拟软件的适应性评价。[方法]选取OLGA与Leda Flow两款主流瞬态模拟软件建立CO_(2)瞬态泄漏数值仿真模型,并利用自行搭建的DN200高压CO_(2)管道泄漏实验装置,开展不同相态CO_(2)瞬态泄漏实验,从压力变化、温度变化、相特性等多个角度评价软件的适应性;以中国某长输CO_(2)管道为例,将该CO_(2)管道瞬态投产现场数据与软件模拟结果进行对比,从工程角度验证两款软件的适应性。[结果]通过对比泄漏实验结果与软件模拟结果发现,对于两个设定的泄漏工况,OLGA软件泄漏压力计算的平均误差分别为15.3%、14.7%,而Leda Flow软件则为16.7%、18.0%,故OLGA软件与Leda Flow软件压力求解准确度相近。OLGA、Leda Flow软件分别存在低估、高估泄漏过程管内最低温度的情况,OLGA软件预测两个测点处最低温度的平均相对误差分别为21.2%、24.5%,而Leda Flow软件平均相对误差分别为13.1%、11.1%。对于某CO_(2)管道投产过程中的压力、温度,OLGA软件模拟的结果平均相对误差分别为1.2%、6.1%,而Leda Flow软件则分别为1.3%、5.2%,可见两款软件模拟结果与现场数据均较为接近。[结论]在CO_(2)管道泄漏过程中,OLGA软件低估泄漏过程最低温度可保证管道低温安全性,且OLGA软件更适用于CO_(2)泄漏过程中管内压力、温度及相特性的预测;在CO_(2)管道投产过程中,OLGA、Leda Flow两款软件均适用于管内的压力、温度模拟研究。

关键词： CO_(2)管道瞬态过程 OLGA LedaFlow 泄漏投产适应性评价

大学生结构设计竞赛中空间杆系结构力学特性分析

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山西建筑 2024年第14期50卷 60-64,106页

作者：朱刘豪桂泽宇宋秋杰程娴张广春陈震柴燕江汉大学数字建造与爆破工程学院湖北武汉430056

针对历年大学生结构设计竞赛中空间杆系结构的赛题,以复压竹皮和竹杆为原材料设计空间杆系结构并进行其结构形式分析。利用有限元软件MIDAS Gen建模和计算,对系列空间杆系结构在多种荷载工况下的应力和位移进行数值模拟仿真,分析其承载... 详细信息

针对历年大学生结构设计竞赛中空间杆系结构的赛题,以复压竹皮和竹杆为原材料设计空间杆系结构并进行其结构形式分析。利用有限元软件MIDAS Gen建模和计算,对系列空间杆系结构在多种荷载工况下的应力和位移进行数值模拟仿真,分析其承载能力和变形特征,总结出空间杆系结构在荷载组合工况下的强度、变形等力学特性以及结构优化的有效措施。

关键词：结构设计竞赛空间杆系结构力学特性有限元分析 MIDAS Gen

HDS of dibenzothiophenes and hydrogenation of tetralin over a SiO2 supported Ni-Mo-S catalyst

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Frontiers of Chemical Science and Engineering 2015年第3期9卷 336-348页

作者： Qiang Wei Jinwen Chen Chaojie song guangchun Li Natural Resources Canada CanmetENERGY-Devon One Oil Patch Drive Devon AB T9G 1A8 Canada Energy Mining & Environment National Research Council Canada 4250 westbrook Mall Vancouver BC V6J 1W5 Canada

一出一步舞综合了在 SiO 2 上支持的 Ni-Mo-S 催化剂被准备并且为 dibenzothiophene (DBT ) 的 hydrodesulphurization (HDS ) 使用了，并且 4,6-dimethyl-dibenzothiophene (4,6-DMDBT ) ，并且为 tetralin 的加氢。催化剂在 280 祮漠... 详细信息

关键词：负载催化剂二苯并噻吩加氢脱硫 SiO2 四氢萘 HDS活性 DBT 催化剂表面