搜索到4772篇“ FLUIDITY“的相关文章
Role of preservation conditions on enrichment and fluidity maintenance of medium to high maturity lacustrine shale oil
2025年
In addition to the organic matter type,abundance,thermal maturity,and shale reservoir space,the preservation conditions of source rocks play a key factor in affecting the quantity and quality of retained hydrocarbons in source rocks of lacustrine shale,yet this aspect has received little attention.This paper,based on the case analysis,explores how preservation conditions influence the enrichment of mobile hydrocarbons in shale oil.Research showns that good preservation conditions play three key roles.(1)Ensure the retention of sufficient light hydrocarbons(C_(1)–C_(13)),medium hydrocarbons(C_(14)–C_(25))and small molecular aromatics(including 1–2 benzene rings)in the formation,which enhances the fluidity and flow of shale oil;(2)Maintain a high energy field(abnormally high pressure),thus facilitating the maximum outflow of shale oil;(3)Ensure that the retained hydrocarbons have the miscible flow condition of multi-component hydrocarbons(light hydrocarbons,medium hydrocarbons,heavy hydrocarbons,and heteroatomic compounds),so that the heavy hydrocarbons(C_(25+))and heavy components(non-hydrocarbons and asphaltenes)have improved fluidity and maximum flow capacity.In conclusion,in addition to the advantages of organic matter type,abundance,thermal maturity,and reservoir space,good preservation conditions of shale layers are essential for the formation of economically viable shale oil reservoirs,which should be incorporated into the evaluation criteria of shale oil-rich areas/segments and considered a necessary factor when selecting favorable exploration targets.
ZHAO WenzhiLIU WeiBIAN CongshengLIU XianyangPU XiugangLU JiaminLI YongxinLI JunhuiLIU ShijuGUAN MingFU XiuliDONG Jin
Influence of minor cerium addition on microstructure and fluidity of as-cast Al-Cu-Mn-Mg alloy
2025年
Al-Cu-Mn alloys are widely used to produce automobile components like cylinder heads and engine blocks because of their capability to retain excellent thermal and mechanical characteristics at high temperatures.However,the Al-Cu-Mn-based alloys demonstrate restricted fluidity,leading to casting defects such as shrinkage and incomplete filling.This research investigated the microstructure and fluidity of Al-4.7Cu-1.0Mn-0.5Mg(wt%)alloy with minor cerium(Ce)addition.The as-cast alloys predominantly compriseα-Al matrix,accompanied by the presence of Al_(2)Cu,Al_(6)Mn,and Al_(8)Cu_(4)Ce phases.The influence of adding Ce on the fluidity of the Al-4.7Cu-1.0Mn-0.5Mg alloy was investigated using a trispiral fluidity test mold in this research.The findings suggest that the addition of Ce within the range of 0.1 wt%to 0.5 wt%in the Al-4.7Cu-1.0Mn-0.5Mg alloy results in an enhancement in fluidity.Specifically,the alloy containing 0.4 wt%Ce exhibits a significant increase in fluidity distance,from 349.7 to 485.7 mm.This improvement can be attributed to the reduction in viscosity,the refinement of secondary dendrite arm spacing,and the modification of secondary phase particles.However,a higher concentration of Ce leads to a decrease in fluidity length,potentially due to the formation of Al_(8)Cu_(4)Ce.
Yishan WangYu BaiKaixi JiangWenxue FanPuxuan WangHai Hao
关键词:MICROSTRUCTUREFLUIDITY
Effect of pouring and mold temperatures on fluidity and hot tearing behavior of cast Al-Li-Cu-Mg-Sc-Zr-Ti alloy
2025年
The influence of pouring temperature and mold temperature on the fluidity and hot tearing behavior of Al-2Li-2Cu-0.5Mg-0.15Sc-0.1Zr-0.1Ti alloys was investigated by experimental investigation and simulation assessment.The results showed that the length of the spiral fluidity sample increases from 302 to 756 mm as the pouring temperature increases from 680 to 740℃,and from 293 to 736 mm as the mold temperature increases from 200 to 400℃.The hot tearing susceptibility(HTS)firstly decreases and then increases with increasing pouring and mold temperatures,which is mainly caused by the oxide inclusion originating from the high activity of Li at excessive pouring temperature.Excessive pouring and mold temperatures easily produce oxide inclusions and holes,leading to a reduction in fluidity and an increase in HTS of the alloy.Combining the experimental and simulation results,the optimized pouring and mold temperatures are~720℃ and~300℃ for the cast Al-Li alloy,respectively.
Yi-xiao WANGGuo-hua WULiang ZHANGYou-jie GUOXin TONGLiang-bin LIXun-man XIONG
关键词:FLUIDITY
From solid to fluid: The possible role of tissue fluidity in mechanical stretch-induced tissue expansion
2025年
Tissue expansion is a widely utilized technique in plastic and reconstructive surgery;however,the biological mechanisms underlying the skin response remain poorly understood.We propose that tissue fluidity,the transition of tissue from a solid-like state to a fluid-like state,plays a pivotal role in enabling the reorganization of the epidermal structure and cellular spatial order,which is essential for effective tissue expansion.Drawing parallels between fluidity in materials science and biological systems,we suggest that the fluid-like behavior in the skin may be critical for mechanical adaptability.Understanding the influence of tissue fluidity may open pathways for modulating this process,potentially enhancing tissue expansion efficiency,reducing procedural duration,and improving clinical outcomes.This perspective highlights the importance of investigating the biological dynamics of tissue fluidity and exploring the potential for targeted manipulation of fluidity-related pathways to optimize tissue expansion.Such advancements could profoundly affect regenerative and reconstructive surgical practices.
Shengzhou ShanXusong Luo
关键词:EPIDERMIS
流动、边缘和南方文学的地域想象
2025年
作为一种地域文学,南方文学诗性主体的建构,不是要通过和北方形成对抗另建一个中心的叙述模式,而是南方各地区异质书写和个性化表述的自然融汇,是不同地域文化主体间性的呈现。南方文学的诗性特征是从南方古老的历史中承传下来的,也是在今天的南方文学书写中不断创造出来的。探讨南方文学的多样性和可能性,对在中国式现代化背景下,建构兼具国际化视野和地方性视角的文学表达具有重要参考意义。
王光
关键词:诗学流动性边缘性风土
浅谈吉氏流动度对焦炭质量的影响研究
2025年
对焦煤吉氏流动度、黏结指数、胶质层最大厚度、镜质组反射率指标之间的关系进行研究,并结合小焦炉试验探讨吉氏流动度对焦炭质量的影响规律。研究发现,吉氏流动度可以较好地反映煤的变质程度、胶质体性质,这对指导配煤炼焦具有重要意义。
吉同超黄利杰史家敏
关键词:镜质组反射率黏结指数焦炭强度
泥岩地层盾构改良渣土流动度评价试验
2025年
为了快速准确评价黏性地层盾构改良渣土的流动性,采用成都轨道交通资阳线盾构区间穿越泥岩地层的渣土样品开展流动度试验和坍落度试验,分析不同泡沫注入率(Foam Injection Rate,FIR)、含砂率情况下,泥岩地层改良渣土的流动度变化情况,并将流动度试验结果与坍落度试验结果进行对比分析。结果表明:相比于坍落度试验,流动度试验耗材少,用时短,可以对渣土流动性进行动态评估;改良渣土的流动度在振动超过60次后趋于稳定;不同含砂率下渣土试样流动度和坍落度具有相关性;当泥岩含砂率大于50%时,不宜采用流动度描述渣土的流动性。建议依托工程改良渣土流动度(振动60次)设定为18~21 cm。
刘朝阳刘雪丹朱牧原方勇
关键词:盾构施工渣土改良泥岩流动度坍落度
Mg元素对K492M高温合金流动性及疏松缺陷的影响
2025年
高温合金结构件逐渐向复杂化和薄壁化发展,在铸造过程中易出现欠铸及疏松等缺陷。基于上述问题,通过ProCAST模拟及实验验证的方法,研究了Mg微合金化对K492M高温合金铸造性能及热物性参数的影响,揭示了Mg元素对流动性和疏松缺陷的影响机理。结果表明,添加Mg元素可有效提高K492M合金流动性,同时降低疏松缺陷。Mg含量为0.01%(质量分数)时,流动性明显提高,相较于母合金流动性提高了32.9%,且疏松缺陷从0.033%降至0.005%。其作用机理主要在于Mg元素使得K492M合金凝固温度区间减小,黏度降低,有利于提高液相流动性;同时,Mg元素的加入使得剩余液相量和碳化物尺寸增加以及黏度降低,从而降低了合金的疏松缺陷。
周煜晗杨文超张丽辉谢君张彦超邢伟杰付文磊樊晓光
关键词:流动性疏松缺陷
低分子量SAN对PMMA流动性及力学性能的影响
2025年
研究旨在探讨两种不同低分子量的苯乙烯-丙烯腈共聚物(SAN)树脂对聚甲基丙烯酸甲酯(PMMA)的流动性、力学性能、相容性、透明性和耐热性的影响。通过差示扫描量热仪、熔体流动速率测试仪、电子万能拉伸仪器和维卡热变形测试仪对体系的各种性能进行评估。结果表明:添加部分低分子量SAN树脂的PMMA体系只有一个玻璃化转变温度,表明该体系具有良好的相容性;低分子量SAN树脂可以将PMMA的熔体流动性提高50%以上,但对材料的透明性和耐热性影响甚微。
朱从山钟铖
关键词:流动性
采用高特福毛细管流变仪测试胶料流动性的研究
2025年
采用高特福RCR20型毛细管流变仪(简称RCR20流变仪)在较高的剪切速率下测试胶料的流动性,考察测试条件和判定指标。结果表明:RCR20流变仪输出曲线中最大挤出速率不能代表挤出稳定时的最大速率,不能作为判定胶料流动性的标准;随着挤出压力的增大,挤出速率和剪切速率增大,且数据更加稳定;结合标准偏差及波动值,可将50~100 s平均挤出速率作为流动性数据稳定的判定指标;根据RCR20流变仪测出的流动性数据可对不同配方胶料的混炼工艺进行优化,其比门尼粘度仪检测更加灵敏。
陈国富李安庆丁祥李卫国
关键词:混炼胶流动性门尼粘度毛细管流变仪

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