Chemical Engineering Research & Design最新文献_第9页

Decarbonizing the fertilizer sector: Evaluation of renewable urea production from agro-industrial wastes through process modeling and supply chain optimization 脱碳肥料部门：通过过程建模和供应链优化评估从农业工业废物中生产可再生尿素

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2026-01-12 DOI: 10.1016/j.cherd.2026.01.020

Diego Lopes, Moisés Teles dos Santos

Nitrogen-based fertilizers production is an energy intensive chemical process, responsible for considerable GHG emissions and heavily dependent on fossil fuels. The present study evaluates the economic feasibility of a renewable urea process by coupling process modeling and simulation with supply chain modeling and optimization. The process model comprises biomass gasification, air separation unit, gas conditioning, carbon capture, ammonia and urea synthesis, and auxiliary utility systems. Six agro-industrial wastes were evaluated: sugarcane bagasse, sugarcane straw, soybean straw, corn stover, rice husk and coffee husk. The supply chain model comprises biomass availability and urea demand using a public dataset of planted area, harvested area and yearly production for all crops of commercial interest at all cities in Brazil. A Mixed-Integer Linear Programming model was developed to evaluate the optimal combination of facility location, biomass and technological routes that maximizes the Net Present Value of the plant. The process model results show that the proposed plant achieves an energy consumption of 21.49 GJ/t and 366.6 kg

C O_{2}

/

t_{u r e a}

with sugarcane bagasse as the most efficient biomass, against 18.40 GJ/t and 2640 kg

C O_{2}

/

t_{u r e a}

for the conventional process. The supply chain model results indicate that processing sugarcane straw with air gasification in the São Paulo region is the best combination of biomass, route and location, achieving an NPV of 355.17 MMUSD and a levelized cost of urea of 319 USD/

t_{u r e a}

. Urea demand and distribution costs are shown to be a critical factor in the feasibility of the plant, which corroborates the importance of a hybrid approach that takes into account both process and supply chain decisions in the deployment of biorefinery processes.

氮基肥料的生产是一个能源密集型的化学过程，造成相当大的温室气体排放，并严重依赖化石燃料。本研究通过过程建模和仿真与供应链建模和优化相结合的方法来评估可再生尿素工艺的经济可行性。该工艺模型包括生物质气化、空分装置、气体调节、碳捕获、氨和尿素合成以及辅助公用事业系统。对甘蔗渣、甘蔗秸秆、大豆秸秆、玉米秸秆、稻壳和咖啡壳等6种农工废弃物进行了评价。供应链模型包括生物质可用性和尿素需求，使用巴西所有城市所有商业利益作物的种植面积、收获面积和年产量的公共数据集。开发了一个混合整数线性规划模型来评估设施位置，生物量和技术路线的最佳组合，以最大化工厂的净现值。过程模型结果表明，以甘蔗渣为最有效的生物质，该工厂实现了21.49 GJ/t和366.6 kg CO2/turea的能源消耗，而传统工艺为18.40 GJ/t和2640 kg CO2/turea。供应链模型结果表明，在圣保罗地区处理甘蔗秸秆与空气气化是生物质、路线和位置的最佳组合，实现了355.17 MMUSD的净现值和319美元/turea的尿素均等化成本。尿素需求和配送成本被证明是影响工厂可行性的关键因素，这证实了混合方法的重要性，该方法在生物炼制过程的部署中同时考虑了过程和供应链决策。

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引用次数: 0

Performance simulation and optimization of a novel wing-type multi-stage hydrocyclone for efficient mineral particle separation 新型翼型多级旋流器高效分离矿物颗粒的性能模拟与优化

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2025-12-31 DOI: 10.1016/j.cherd.2025.12.044

Xinfeng Wang , Xinle Yang , Ruichen Ren , Shengdong Lu , YuYing Tu

A novel Wing-Type Multi-stage Hydrocyclone (WMC) is proposed to address the common issue of underflow entrainment in conventional hydrocyclones used for mineral particle separation. By integrating secondary cyclones in parallel within the conical section, the design enhances classification accuracy, reduces the misplacement of fine particles into the underflow, and improves mineral product quality. A numerical investigation was conducted using Computational Fluid Dynamics (CFD) simulations, employing the Volume of Fluid (VOF) model and the Discrete Phase Model (DPM). For the classification of graphite ore in the 20–45 μm particle size range, the simulation results showed that the WMC reduced the underflow fine-particle entrainment rate from 17.3 % (conventional design) to 12.7 %, representing a net decrease of 4.6 %age points and a relative reduction of 26.6 %. Furthermore, the classification efficiency for the critical particle size range (20–45μm) improved by approximately 10 %. To further validate the numerical model and the effectiveness of the WMC structural design, an experimental system was established, and the results confirmed the accuracy of the simulation under actual operating conditions. Based on the validated model, a sensitivity analysis identified the secondary cyclone positions and the feed pressure as critical parameters. Subsequently, Response Surface Methodology (RSM) and a Genetic Algorithm (GA) were employed to optimize these parameters. The optimal parameter combination further reduced the underflow entrainment rate by 3.18 %, demonstrating a substantial improvement in the overall classification performance.

针对常规旋流器在矿物颗粒分离中存在的底流夹带问题，提出了一种新型翼型多级旋流器。该设计通过在锥形截面内平行集成二次旋风，提高了分类精度，减少了细颗粒在底流中的错位，提高了矿物产品质量。采用计算流体动力学（CFD）模拟，采用流体体积（VOF）模型和离散相模型（DPM）进行了数值研究。对于20 ~ 45 μm粒度范围内的石墨矿石分级，模拟结果表明，WMC将下流细粒夹带率从17.3 %（常规设计）降低到12.7 %，净降低4.6个年龄点，相对降低26.6 %。此外，在临界粒径范围（20 ~ 45μm）内，分级效率提高了约10 %。为了进一步验证数值模型和WMC结构设计的有效性，建立了实验系统，实验结果在实际工况下验证了仿真的准确性。在验证模型的基础上，进行了灵敏度分析，确定了二次旋流器位置和进料压力为关键参数。随后，采用响应面法（RSM）和遗传算法（GA）对参数进行优化。优化后的参数组合进一步降低了下流夹带率3.18 %，整体分类性能有了较大的提高。

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引用次数: 0

Layer-by-layer coating of silibinin-loaded cochleates with chitosan and alginate for enhanced oral delivery 壳聚糖和海藻酸盐层涂覆水飞蓟宾酸酯以增强口服给药

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2025-12-16 DOI: 10.1016/j.cherd.2025.12.029

Nishtha Thakur, Zaher Judeh

The oral bioavailability of silibinin (SLB), a flavonoid from milk thistle, is limited by poor solubility and low gastrointestinal absorption. This study presents an efficient oral delivery system for SLB using lipid-based cochleates coated with chitosan (CH) and sodium alginate (SA) through a layer-by-layer approach. SLB-loaded cochleates were prepared at pH 6.0 and 7.4 with varying lipid-to-SLB ratios and characterized for morphology, encapsulation efficiency, and physicochemical properties. Cochleates at pH 7.4 showed superior encapsulation (99 %) and stability over pH 6.0. Optimized CH/SA coatings enhanced stability, reduced SLB leakage, and enabled controlled release. In-vitro studies showed SA/CH-coated cochleates minimized SLB release in gastric fluid, sustaining it in intestinal conditions. Stability studies confirmed the coatings' protective effect, retaining 97.84 % of SLB after 12 weeks at 4°C. These findings suggest SA/CH-coated cochleates as a promising platform for oral delivery of poorly soluble bioactives like SLB.

水飞蓟宾（SLB）是一种从水飞蓟中提取的类黄酮，它的口服生物利用度受溶解度差和胃肠道吸收低的限制。本研究采用壳聚糖（CH）和海藻酸钠（SA）包覆脂基耳蜗酸酯，通过逐层给药的方法，建立了一种高效的口服SLB给药系统。在pH 6.0和7.4条件下制备了负载slb的蜗状体，其脂质与slb的比例不同，并对其形态、包封效率和理化性质进行了表征。在pH 7.4时，Cochleates表现出良好的包封性（99% %），在pH 6.0时表现出稳定性。优化后的CH/SA涂层增强了稳定性，减少了SLB泄漏，并实现了可控释放。体外研究表明，SA/ ch包被的耳蜗可减少胃液中SLB的释放，在肠道条件下维持其释放。稳定性研究证实了涂层的保护作用，在4°C下加热12周后，涂层保留了97.84 %的SLB。这些研究结果表明，SA/ ch包被的耳蜗酸盐是口服递送SLB等难溶性生物活性物质的有希望的平台。

引用次数: 0

Silver-based deep eutectic solvent for the extraction and separation of 1-octene/n-octane: Insights into the underlying molecular mechanism 银基深共熔溶剂对1-辛烯/正辛烷的萃取与分离：潜在分子机制的洞察

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2026-01-20 DOI: 10.1016/j.cherd.2026.01.042

Kang Zhao , Shasha Zhao , Zhen Liu

Addressing the core challenge of insufficient selectivity of traditional solvents in the separation of long-chain α-olefins/alkanes (such as 1-octene/n-octane), this study innovatively constructs a silver trifluoromethanesulfonate (AgOTf)/N,N-dimethylformamide (DMF) deep eutectic solvent (DES) system based on the “Ag⁺-DMF” synergistic coordination and hydrogen bonding network mechanism for the extraction and separation of 1-octene/n-octane. Through systematic optimization of process parameters, under conditions of 273 K, an alkane/olefin mass ratio of 2:1, water content of 5 %, HBA:HBD molar ratio of 1:2, and a rotational speed of 200 rpm, the system achieves a remarkable separation selectivity of 27.23 for 1-octene/n-octane. Quantum chemical calculations based on Density Functional Theory (DFT) indicate that 1-octene is specifically captured by AgOTf/DMF through strong Ag⁺-π bonding (binding energy: −45.0 kJ/mol) and OTf^⁻∙∙∙H-C hydrogen bonding. In contrast, n-octane exhibits only weak non-specific interactions with AgOTf/DMF (binding energy: −0.2 kJ/mol), resulting in a binding energy difference of 44.8 kJ/mol, which overcomes the separation bottleneck caused by the similar physicochemical properties of olefins and alkanes. Additionally, the DES demonstrates excellent low-temperature regenerability and cyclic stability, offering a promising new solvent solution for industrial olefin/alkane separation.

针对传统溶剂在分离长链α-烯烃/烷烃（如1-辛烯/正辛烷）时选择性不足的核心挑战，本研究基于“Ag + -DMF”协同配位和氢键网络机制，创新构建了三氟甲磺酸银(AgOTf)/N，N-二甲基甲酰胺（DMF）深度共晶溶剂（DES）体系，用于1-辛烯/正辛烷的萃取分离。通过系统优化工艺参数，在273 K、烷烃/烯烃质量比为2:1、水含量为5 %、HBA:HBD摩尔比为1:2、转速为200 rpm的条件下，系统对1-辛烯/正辛烷的分离选择性达到了27.23。基于密度函数理论（DFT）的量子化学计算表明，AgOTf/DMF通过强Ag + -π键（结合能：−45.0 kJ/mol）和OTf⁻∙∙∙H-C氢键特异性捕获1-辛烯。而正辛烷与AgOTf/DMF仅表现出弱的非特异性相互作用（结合能：−0.2 kJ/mol），导致两者的结合能差达44.8 kJ/mol，克服了烯烃与烷烃相似的物理化学性质造成的分离瓶颈。此外，DES还具有良好的低温可再生性和循环稳定性，为工业烯烃/烷烃分离提供了一种有前景的新型溶剂解决方案。

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引用次数: 0

Fabricating nitrile and sulfonate functionalized nonwoven polyethylene (PE) adsorbent by using radiation-induced grafting for efficient capture of Cr (VI) and Co (II) 辐射接枝法制备硝基磺酸基功能化无纺布聚乙烯（PE）吸附剂，高效捕获Cr （VI）和Co （II）

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.cherd.2026.01.011

Shebly Akter , Nazia Rahman , Umme Salma , Md. Ferdous Alam , Md Minhajul Islam , Zeenath Fardous , M. Ahasanur Rabbi , Md. Nabul Sardar

Environmental pollution resulting from heavy metal effluents is a significant concern, and it becomes necessary to treat these effluents before they are released into the ecosystem. In this study, the adsorption of Cr (VI) and Co (II) ions was analyzed from aqueous solution by using grafted amidoximated grafted fabrics. The radiation-induced (γ-ray) grafting method (a 50 kGy radiation dose) was used to graft non-woven Polyethylene (PE) with Acrylonitrile (AN) and Sodium Styrene Sulfonate (SSS) co-monomers. The grafted fabrics were amidoximated. FTIR, SEM, TGA, and DMA were used to characterize the adsorbent. The maximum capacity of adsorption was obtained at a contact time of 24 h, an initial metal ion concentration of 600 ppm, pH 1.43, and temperature of 60 °C for Cr (VI), and a contact time of 6 h, an initial metal ion concentration of 400 ppm, pH 8.05 and temperature of 70 °C for Co (II) during the dynamic adsorption phenomena. The findings demonstrated how well the Langmuir isotherm model fit the data, with the highest adsorption capacity of 138.95 mg/g for Cr (VI) and 97.86 mg/g for Co (II). According to kinetic observations, the batch experimental results were found to be consistent with the pseudo-second-order model. The values of ΔH°, ΔS°, and ΔG° in the thermodynamic study suggest that the process of removal was endothermic, spontaneous, and favorable, as demonstrated in the thermodynamic observation. Furthermore, investigating the adsorbent's ability to desorb metal ions and its reusability indicates that it is a novel and efficient alternative material for removing Cr (VI) and Co (II) ions from the aqueous environment.

重金属废水造成的环境污染是一个重大问题，有必要在这些废水排放到生态系统之前对其进行处理。研究了偕胺肟化接枝织物对水溶液中Cr （VI）和Co （II）离子的吸附性能。采用辐射诱导（γ射线）接枝方法（辐射剂量为50 kGy）将无纺布聚乙烯（PE）与丙烯腈（AN）和苯乙烯磺酸钠（SSS）共单体接枝。接枝织物经氨基肟化处理。用FTIR、SEM、TGA和DMA对吸附剂进行了表征。在动态吸附过程中，接触时间为24 h，初始金属离子浓度为600 ppm， pH为1.43，温度为60℃时，Cr （VI）的吸附量最大；接触时间为6 h，初始金属离子浓度为400 ppm， pH为8.05，温度为70℃时，Co （II）的吸附量最大。Langmuir等温线模型对Cr （VI）和Co （II）的最高吸附量分别为138.95 mg/g和97.86 mg/g。根据动力学观察，批实验结果与伪二阶模型一致。热力学研究中ΔH°、ΔS°和ΔG°的值表明，热力学观察表明，脱除过程是吸热的、自发的、有利的。此外，对吸附剂解吸金属离子的能力及其可重复使用性的研究表明，它是一种从水环境中去除Cr （VI）和Co （II）离子的新型高效替代材料。

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引用次数: 0

Investigation of flow characteristics in T-junction gas–liquid separator based on pressure balance 基于压力平衡的t型气液分离器流动特性研究

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2026-01-09 DOI: 10.1016/j.cherd.2026.01.018

Liangyu Cai , Donghai Yang , Hairong Li , Yuejiu Liang , Zhuochao Li , Feng Guo , Mofan Li , Limin He

In this study, a new method for the design of T-junction gas–liquid separators based on the pressure balance is proposed. The pressure in the T-junction separator was calculated using the pressure balance, and the structural parameters can be obtained. Further, numerical simulations were conducted to investigate the influence of the branch flow ratio and branch spacing to optimize the design method. Compared with a traditional T-junction separator, the separation efficiency of the T-junction separator based on the pressure balance method (PBTS) is higher by 13 %. Furthermore, to improve the separation efficiency, new structures have been designed: the straight T-junction separator (STS), the return-type T-junction separator (RTS), and the return-type T-junction separator with a finger buffer structure (RTSF). The experiment results indicate that the flow process and separation efficiency were consistent with the numerical simulation results. Under the design flow rate, the separation efficiency of STS, RTS, and RTSF is 85.3 %, 77.5 %, and 74.2 %. However, when the flow rate changes, the separation efficiency of RTS is higher, and the RTSF exhibits the smallest fluctuation. Overall, the RTS is the most optimal structure. This study is important for flow control and gas–liquid separation in multiphase flow.

本文提出了一种基于压力平衡的t型气液分离器设计新方法。利用压力平衡法计算了t型分选机的压力，得到了分选机的结构参数。在此基础上，通过数值模拟研究了支路流量比和支路间距对设计方法的影响。与传统的t结分离器相比，基于压力平衡法（PBTS）的t结分离器分离效率提高了13 %。此外，为了提高分离效率，设计了直线型t型分离器（STS）、返回型t型分离器（RTS）和带手指缓冲结构的返回型t型分离器（RTSF）。实验结果表明，流动过程和分离效率与数值模拟结果一致。在设计流量下，STS、RTS和RTSF的分离效率分别为85.3 %、77.5 %和74.2 %。而当流量变化时，RTS的分离效率更高，RTSF波动最小。总的来说，RTS是最理想的结构。该研究对多相流的流动控制和气液分离具有重要意义。

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引用次数: 0

Assessing mixing performance and power consumption in the ambr® 250 bioreactor 评估ambr®250生物反应器的混合性能和功耗

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2026-01-14 DOI: 10.1016/j.cherd.2026.01.030

Laia Miranda , Sara Rodriguez-Conde , Olalekan Daramola , Andrea Ducci , Martina Micheletti

The ambr® 250, a miniaturized bioreactor extensively used in biopharmaceutical R&D, was characterized to evaluate power and mixing dynamics for mammalian cell culture applications. The study analyzed the effects of agitation speed, impeller configuration, internal components, working volume, and feed placement on dimensionless mixing number (

{Nt}_{m}

) and power number (

N_{P})

. Six impeller designs, including single and dual elephant ear (EE) configurations with varied angles and diameters, were investigated. Down-pumping (DP) mode reduced

{Nt}_{m}

by 54 % and increased cumulative

N_{P}

by 14–22 % compared to up-pumping (UP) mode. Mixing time (

t_{m}

) remained consistent between single and dual EE impellers, though cumulative

N_{P}

was 33 % higher for single EE impellers. Dual EE impellers in DP mode achieved the lowest power input per volume (

P / V

) for similar

t_{m}

. Spatial mixing time distribution and probe-induced effects on mixing parameters were also assessed. An early transition to turbulence was observed at Reynolds numbers (

Re

) below 10,000 in unbaffled systems, regardless of the presence of internal components such as baffles and probes. Probes increased

N_{P}

and

{Nt}_{m}

by 49 % and 26 %, respectively. This characterization advances understanding of milliliter-scale bioreactor performance and provides a foundation for optimizing the design and operation of mammalian cell-based processes.

ambr®250是一种广泛用于生物制药研发的小型生物反应器，用于评估哺乳动物细胞培养应用的功率和混合动力学。研究分析了搅拌转速、叶轮构型、内部部件、工作体积和进料位置对无量纲混合数（Ntm）和功率数（NP）的影响。研究了不同角度和直径的单象耳和双象耳叶轮设计。与上抽（UP）模式相比，下抽（DP）模式减少了54%的Ntm，增加了14 - 22%的累积NP。混合时间（tm）在单叶轮和双叶轮之间保持一致，尽管单叶轮的累积NP高33%。DP模式下的双EE叶轮在类似的tm中实现了最低的每体积功率输入（P/V）。研究了混合时间的空间分布和探针对混合参数的影响。在无挡板系统中，无论是否存在挡板和探针等内部组件，在雷诺数（Re）低于10,000时，都观察到早期过渡到湍流。探针使NP和ntm分别增加了49%和26%。这种表征促进了对毫升级生物反应器性能的理解，并为优化哺乳动物细胞工艺的设计和操作提供了基础。

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引用次数: 0

Sorption-enhanced syngas-to-olefins in a dual-zone fluidized-bed reactor: Integrated kinetic–adsorption modeling and process intensification 双区流化床反应器中吸附增强合成气制烯烃：集成动力学吸附模型和过程强化

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2025-12-30 DOI: 10.1016/j.cherd.2025.12.039

Hualun Zhu , Jun Cao , Massimiliano Materazzi

The sorption-enhanced syngas-to-olefins (SEOS) process provides an intensified pathway for olefin production by integrating syngas hydrogenation, methanol-to-olefins (MTO) conversion, and in-situ water removal within a single reactor. In this work, a MATLAB-based model was developed for a dual-zone fluidized-bed system formed through natural hydrodynamic segregation of Zn–Zr, SAPO-34, and 3 A molecular sieve particles. The lower zone promotes CO/CO₂ hydrogenation to methanol and dimethyl ether, while the upper zone converts intermediates to light olefins with continuous water removal. The model incorporates intrinsic kinetics, Langmuir-type adsorption, and bed expansion correlations, and was validated against experimental data, showing close agreement in carbon conversion and olefin selectivity. Parametric studies indicate that CO₂ addition (5–10 %) lowers overall carbon conversion from 15.5 % to 12.8 % but exerts little influence on olefin distribution, where propylene (∼45 %) remains dominant. The inclusion of 3 A sieves enhances carbon conversion up to 20 % by suppressing reverse water–gas shift and alleviating water inhibition on SAPO-34. Temperature analysis identifies an optimum near 400 °C, maximizing light-olefin yields while limiting secondary hydrogenation. These results demonstrate that dual-zone SEOS reactors effectively broaden the operating window, improve efficiency, and offer a viable route for sustainable olefin production.

吸附增强型合成气制烯烃（SEOS）工艺通过在单个反应器内集成合成气加氢、甲醇制烯烃（MTO）转化和原位除水，为烯烃生产提供了强化途径。本文基于matlab建立了由Zn-Zr、SAPO-34和3 a分子筛颗粒自然水动力偏析形成的双区流化床系统模型。下部区域促进CO/CO₂加氢生成甲醇和二甲醚，上部区域将中间体转化为轻烯烃，并持续脱水。该模型结合了固有动力学、langmuir型吸附和床层膨胀相关性，并根据实验数据进行了验证，结果表明碳转化率和烯烃选择性非常吻合。参数研究表明，CO₂的添加（5-10 %）使总碳转化率从15.5 %降低到12.8 %，但对烯烃分布影响不大，其中丙烯（~ 45 %）仍然占主导地位。3个 A分子筛通过抑制逆水气转换和减轻SAPO-34的水抑制作用，使碳转化率提高了20% %。温度分析确定了400°C附近的最佳温度，最大限度地提高了轻质烯烃产量，同时限制了二次氢化。这些结果表明，双区SEOS反应器有效地拓宽了操作窗口，提高了效率，为可持续生产烯烃提供了一条可行的途径。

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引用次数: 0

Spatial characteristics of turbulence induced by a pair of horizontally oscillating grids: A large eddy simulation study 一对水平振荡网格引起的湍流空间特征：大涡模拟研究

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2025-12-11 DOI: 10.1016/j.cherd.2025.12.022

Zhixin Sun , Xiaoheng Li , Bingyu Chen , Xiaokang Yan , Lijun Wang , Lin Li , Haijun Zhang

Isotropic turbulence plays a fundamental role in turbulence research and helps to understand more complex turbulent flows. Oscillating grid is a commonly used method for generating nearly uniform and isotropic turbulence in experimental research. However, the factors that govern the extent of the isotropic region remain uncertain, and discrepancies persist among the predictive correlations for the effective turbulence intensity. In this study, Large Eddy Simulation was conducted to examine the spatial characteristics of turbulence generated by a pair of horizontally oscillating grids. The effects of spatial position, oscillation amplitude, and frequency on the turbulent kinetic energy spectrum, dissipation rate, and effective turbulence intensity were systematically analyzed. Furthermore, the influence of energy input variations on turbulence intensity was investigated, and a modified correlation for effective turbulence intensity applicable to this configuration was proposed. This work provides a numerical framework for studying oscillating-grid turbulence and offers practical guidance for the structural design and optimization of grid configurations.

各向同性湍流在湍流研究中起着重要的作用，有助于理解更复杂的湍流。振荡网格是实验研究中常用的一种产生近均匀和各向同性湍流的方法。然而，控制各向同性区域范围的因素仍然不确定，有效湍流强度的预测相关性之间的差异仍然存在。本文采用大涡模拟的方法研究了一对水平振荡网格所产生的湍流的空间特征。系统分析了空间位置、振荡幅值和频率对湍流动能谱、耗散率和有效湍流强度的影响。此外，研究了能量输入变化对湍流强度的影响，并提出了适用于该构型的有效湍流强度的修正相关性。该工作为研究振荡网格湍流提供了一个数值框架，并为网格结构设计和优化提供了实用指导。

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引用次数: 0

Research on drag reduction and permeability enhancement of micro nano bubbles in gas displacement 气体驱替中微纳气泡减阻增渗研究

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design

Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.cherd.2026.01.007

Zhonghao Liu , Shilin Li , Pengfei Wang , Yong Chen , Yafei Luo , Fei Huang

To improve the problems of cost, environment and efficiency faced by traditional coal seam water injection technology, this paper proposes to use micro-nano bubble (MNB) water as a new water injection medium, and studies its performance through experimental systems such as wettability, drag reduction, microstructure and gas displacement. The results showed that MNB water significantly improved the wettability of coal, with the surface tension being instantaneously reduced by 12.6 mN/m and the contact angle decreasing by approximately 11.17°. A notable drag reduction effect was observed during the water injection process, where the maximum drag reduction rate reached 28.05 %. Microscopically, it promoted the secondary development of pores in coal, resulting in increases in porosity and permeability by 22.73 % and 27.61 %, respectively, compared to raw coal. In the gas displacement experiment, the instantaneous flow rate and gas permeability increased by up to 44.21 % and 42.81 %, respectively. This study confirms that MNB water has great potential in enhancing water injection effects, improving the wettability of coal bodies and strengthening gas displacement, providing an economical and environmentally friendly new approach for the prevention and control of coal mine disasters. However, its universality needs to be further verified through experiments on coal samples of different coal grades in the future.

为改善传统煤层注水技术面临的成本、环境和效率问题，本文提出采用微纳气泡（MNB）水作为新型注水介质，并通过润湿性、减阻性、微观结构和驱气性等实验体系研究其性能。结果表明，MNB水显著改善了煤的润湿性，表面张力瞬间降低12.6 mN/m，接触角瞬间降低约11.17°。注水过程中减阻效果显著，最大减阻率达到28.05 %。微观上促进了煤中孔隙的二次发育，孔隙度和渗透率较原煤分别提高22.73 %和27.61 %；在驱替实验中，瞬时流量和渗透率分别提高了44.21 %和42.81 %。本研究证实了MNB水在增强注水效果、改善煤体润湿性、加强瓦斯驱替等方面具有巨大潜力，为煤矿灾害防治提供了一条经济环保的新途径。但其普适性有待于今后在不同煤级煤样上的实验进一步验证。

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