Rheologica Acta最新文献_第2页

Stringimeter: an open source, cost-effective and versatile device for probing complex fluids in uniaxial extensional flow Stringimeter：一个开源的，具有成本效益的多功能设备，用于探测单轴拉伸流中的复杂流体

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-06-09 DOI: 10.1007/s00397-026-01579-2

Vincenzo Calabrese

{"title":"Stringimeter: an open source, cost-effective and versatile device for probing complex fluids in uniaxial extensional flow","authors":"Vincenzo Calabrese","doi":"10.1007/s00397-026-01579-2","DOIUrl":"10.1007/s00397-026-01579-2","url":null,"abstract":"<div><p>It is increasingly common to use self-thinning of slender fluid filaments to infer the rheological properties of complex fluids under uniaxial extensional flow. These techniques require precise control over how filament thinning is triggered, as implemented in methods such as dripping-onto-substrate (DoS) and the commercial capillary-breakup extensional rheometer (CaBER), together with high-speed imaging to resolve rapid thinning dynamics. Here, we introduce the Stringimeter, a low-cost and modular capillary-driven thinning platform that integrates CaBER-like and DoS-like configurations within a single adaptable framework. The system combines moderate-speed imaging (up to 420 frames/s) with a temporal superposition strategy that increases the effective sampling rate and reduces reliance on expensive high-speed cameras. Validation with Newtonian fluids and polymer solutions demonstrates reliable extraction of elastocapillary timescales as low as <span>(tau _{textrm{EC}} approx 6)</span> ms, corresponding to a polymer relaxation time of <span>(lambda =tau _{textrm{EC}} /3approx 2)</span> ms within the Oldroyd–B model. The open-source architecture enables broad adaptability and, by maintaining a total system cost of approximately 1% of standard setups, provides accessible laboratory-scale extensional rheology measurements to a wide research community.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"65 8","pages":"665 - 675"},"PeriodicalIF":2.7,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-026-01579-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148496659","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

Critical assessment of rheological tests to characterize polymer support fluids using CFD 利用CFD对聚合物支撑液流变测试进行关键评估

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-05-28 DOI: 10.1007/s00397-026-01573-8

Yongxin Wang, Si Suo, Stephan A Jefferis, Martin J Blunt, Catherine O’Sullivan

{"title":"Critical assessment of rheological tests to characterize polymer support fluids using CFD","authors":"Yongxin Wang, Si Suo, Stephan A Jefferis, Martin J Blunt, Catherine O’Sullivan","doi":"10.1007/s00397-026-01573-8","DOIUrl":"10.1007/s00397-026-01573-8","url":null,"abstract":"<p>Aqueous solutions of hydrolyzed polyacrylamide polymer (HPAM) are now regularly used to support excavation in underground construction, e.g., trenches and pile bores, because of their high viscosity and shear-thinning nature. To ensure excavation stability, it is crucial to maintain the high fluid viscosity and therefore to be able to measure it accurately on site. In this work, two tests commonly used in civil engineering are assessed, i.e. the Fann viscometer and the Marsh funnel. These tests measure viscosity in different ways; the Fann viscometer uses a torque measurement, while the Marsh funnel measures the discharge time for a fixed flow volume. We employed high-resolution computational fluid dynamics (CFD) techniques to simulate both test processes and assessed the extent to which the test predictions by the standard measurement protocols can capture the rheological parameters. The results suggest that the Fann viscometer is reliable at very low shear rates; however, inertial effects lead to an overestimation of apparent viscosity at high rotational velocities. Though a correction factor can be successfully applied to correct Fann viscometer data in the case of Newtonian fluids, it is unlikely that a single correction factor can be used for HPAM fluids. The Marsh funnel time is very sensitive to the infinite-shear-rate viscosity for HPAM fluids. This presents a challenge to its use as an in-situ quality control measure as the infinite-shear-rate viscosity is similar for HPAM with different concentrations. The critical assessment offered in this work supports the development of new experimental approaches for quality control when polymer fluids are used in ground engineering construction projects.</p>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"65 7","pages":"577 - 594"},"PeriodicalIF":2.7,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-026-01573-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148292285","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

Creep ringing in generalized linear viscoelastic models 广义线性粘弹性模型中的蠕变环

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-05-26 DOI: 10.1007/s00397-026-01577-4

Sachin Shanbhag

引用次数: 0

Determination of linear viscoelastic range for asphalt binders in the dynamic shear rheometer 动态剪切流变仪中沥青粘合剂线性粘弹性范围的测定

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-05-23 DOI: 10.1007/s00397-026-01576-5

Johannes Büchner, Torsten Remmler, Maxi Mrusek, Michael P. Wistuba

{"title":"Determination of linear viscoelastic range for asphalt binders in the dynamic shear rheometer","authors":"Johannes Büchner, Torsten Remmler, Maxi Mrusek, Michael P. Wistuba","doi":"10.1007/s00397-026-01576-5","DOIUrl":"10.1007/s00397-026-01576-5","url":null,"abstract":"<div><p>Oscillatory amplitude sweeps are essential for determining linear viscoelastic properties of asphalt binders because selection of unsuitable amplitudes can lead to measurement mistakes, material failure and misinterpretation. This study provides extended information and guidelines about the procedure and analysis of amplitude sweeps for asphalt binders. Different rheological parameters to identify the linearity limit are discussed together with recommended shear amplitude values from current international technical Standards. A large set of amplitude sweep tests is performed in the dynamic shear rheometer (DSR) to reveal the effects of test temperature, test frequency, aging state, binder type, test geometry and control mode (shear stress vs. shear strain) on amplitude sweep results and linearity limit. A systematic analysis including considering of the harmonic distortion of the materials sinusoidal response signals allow selection of best suitable shear amplitudes for different test conditions. Test temperature shows the highest influence on the suitable shear amplitudes, with a proposed increase of one decade for a temperature increment of 30 °C. Finally, recommended shear amplitude values were derived and presented in nomograms in function of the temperature for different binder grades in fresh and in RTFOT + PAV-aged states.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"65 7","pages":"635 - 650"},"PeriodicalIF":2.7,"publicationDate":"2026-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-026-01576-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148292286","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

Interfacial dilational rheology of extended surfactants with short hydrophobic groups: role of ionic heads and hydrophobic tails 具有短疏水基团的扩展表面活性剂的界面膨胀流变性：离子头和疏水尾的作用

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-05-23 DOI: 10.1007/s00397-026-01575-6

Qin Jiang, Zhixin Li, Peiyu Sun, Ruizhu Yang, Zhicheng Xu, Lei Zhang, Lu Zhang

{"title":"Interfacial dilational rheology of extended surfactants with short hydrophobic groups: role of ionic heads and hydrophobic tails","authors":"Qin Jiang, Zhixin Li, Peiyu Sun, Ruizhu Yang, Zhicheng Xu, Lei Zhang, Lu Zhang","doi":"10.1007/s00397-026-01575-6","DOIUrl":"10.1007/s00397-026-01575-6","url":null,"abstract":"<div><p>To clarify the influence of molecular structure on interfacial behaviors of extended surfactants, interfacial rheological properties of three extended surfactants with different ionic heads (C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>C and C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>S) and different hydrophobic tails (C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>C and phP<sub>10</sub>E<sub>5</sub>C) were investigated by the droplet analysis method. The effects of adsorption time, interfacial pressure, oscillating frequency, and concentration on the dilational modulus and phase angle of C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>C, C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>S, and phP<sub>10</sub>E<sub>5</sub>C were determined. Results indicate that interfacial films of these three extended surfactants exhibit predominantly elastic behavior. The modulus and phase angle of C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>C and C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>S with different ionic heads exhibit little variation at variable experimental conditions, indicating that different ionic heads have a negligible effect on interfacial film properties. At low interfacial pressures, the adsorption layer is in a local thermodynamic quasi-equilibrium state with negligible intrinsic relaxation processes. At high interfacial pressures, the diffusion exchange process may play a more important role in the interfacial film of C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>C. Compared to C<sub>8</sub>P<sub>10</sub>E<sub>5</sub>C, phP<sub>10</sub>E<sub>5</sub>C with a different hydrophobic group maintains a higher dilational modulus over a wider concentration range due to its rigid phenyl groups. Compared to ionic heads, hydrophobic tails exert a more pronounced influence on the interfacial rheological behavior of extended surfactants. These findings are expected to contribute to the rational design of extended surfactants with a short hydrophobic group.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"65 7","pages":"595 - 609"},"PeriodicalIF":2.7,"publicationDate":"2026-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148292227","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

Effects of side-chain mixing ratio and core structure on the rheological properties of PMDA-based organogelators in isododecane 侧链混合比例和核心结构对pmda基异十二烷有机凝胶流变性能的影响

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-05-12 DOI: 10.1007/s00397-026-01574-7

Aya Kaide, Takashi Saeki

引用次数: 0

Correction to: Rheological properties of liquid crystalline solutions of ethylcellulose in the isotropic phase 修正：各向同性相乙基纤维素液晶溶液的流变性能

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-05-08 DOI: 10.1007/s00397-026-01572-9

Jun-ichi Horinaka, Masataka Yamashita

引用次数: 0

Time-scale separation in thixotropic structural rebuilding of carbon black suspensions revealed by rheo-impedance measurements 流变阻抗测量揭示了炭黑悬浮液触变结构重建中的时间尺度分离

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-04-25 DOI: 10.1007/s00397-026-01571-w

Yoshifumi Yamagata, Tomomi Wataya, Isao Shitanda

{"title":"Time-scale separation in thixotropic structural rebuilding of carbon black suspensions revealed by rheo-impedance measurements","authors":"Yoshifumi Yamagata, Tomomi Wataya, Isao Shitanda","doi":"10.1007/s00397-026-01571-w","DOIUrl":"10.1007/s00397-026-01571-w","url":null,"abstract":"<div><p>In this study, carbon black (Ketjen Black) suspensions were employed as model non-Newtonian particulate systems to investigate shear-history-dependent structural reconstruction dynamics using a rheo-impedance approach. Slurries dispersed with poly(vinylpyrrolidone) (PVP) of different molecular weights and concentrations exhibited pronounced shear-thinning behavior, and both the magnitude of shear thinning and the power-law index strongly depended on dispersant concentration and molecular weight. Step shearing tests revealed that particle networks disrupted under high shear were rebuilt after shear cessation. Under steady shear conditions, a clear inverse correlation was observed between the relative viscosity η<sub>r</sub> and the total electrical resistance R<sub>T</sub>, indicating that both responses reflect the same underlying particle-network structure through mechanical connectivity and electrically effective particle contacts. However, during the recovery process after shear cessation, the temporal evolutions of mechanical and electrical responses did not coincide. The recovery of the electrical network was delayed relative to that of the mechanical network, demonstrating decoupled recovery dynamics governed by distinct characteristic time scales. These findings highlight that structural rebuilding in non-Newtonian particulate suspensions cannot be described by a single kinetic process, but instead involves time-scale separation between mechanical network formation and electrically effective contact reformation. The rheo-impedance method provides a complementary tool for probing thixotropic structural reconstruction and offers new insight into the dynamics of particle-network rebuilding under shear.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"65 7","pages":"623 - 634"},"PeriodicalIF":2.7,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-026-01571-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148292284","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

Rheological properties of liquid crystalline solutions of ethylcellulose in the isotropic phase 乙基纤维素液晶溶液在各向同性相中的流变性能

IF 2.7 3区工程技术

Rheologica Acta Pub Date : 2026-04-25 DOI: 10.1007/s00397-026-01570-x

Jun-ichi Horinaka, Masataka Yamashita

{"title":"Rheological properties of liquid crystalline solutions of ethylcellulose in the isotropic phase","authors":"Jun-ichi Horinaka, Masataka Yamashita","doi":"10.1007/s00397-026-01570-x","DOIUrl":"10.1007/s00397-026-01570-x","url":null,"abstract":"<div><p>The effect of liquid crystallinity on the rheological properties of ethylcellulose solutions in the isotropic phase has been examined using four solvents. Double-logarithmic plots of dynamic viscoelasticity at different temperatures can be superposed with each other by the combination of arbitrary horizontal and vertical shifts. However, it has been found that some plots are superposed in the framework of the conventional time-temperature superposition principle and the other needs further shifts. Accordingly, it is asserted that the isotropic phase consists of two categories and what should be called semi-isotropic phase lies between full-isotropic and liquid crystal phases. The conditions for respective phases with respect to the ethylcellulose concentration and temperature have been mapped out as a consequence of rheological analysis. The feature of the semi-isotropic phase is pictured by the local alignment of ethylcellulose chains precedent to the formation of a cholesteric liquid crystal, which would contribute to the reduction of chain entanglement. The zero-shear viscosity as well as the plateau modulus in the full-isotropic phase can be scaled by the concentration with an exponent that is independent of the solvent, while at the same time it is revealed that ethylcellulose chains exhibit specific interaction with each solvent. The rheological behavior of full-isotropic concentrated solutions can be characterized by that of semiflexible chains in the tightly-entangled regime.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"65 7","pages":"651 - 662"},"PeriodicalIF":2.7,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148292287","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

Viscoelastic alterations of human semen associated with diagnosed male infertility 男性不育症与人类精液粘弹性改变有关

IF 3 3区工程技术

Rheologica Acta Pub Date : 2026-04-21 DOI: 10.1007/s00397-026-01569-4

Eleonora Pero, Giovanna Tomaiuolo, Federica Cariati, Valentina Preziosi, Antonella Panarelli, Ida Strina, Carlo Alviggi, Stefano Guido

{"title":"Viscoelastic alterations of human semen associated with diagnosed male infertility","authors":"Eleonora Pero, Giovanna Tomaiuolo, Federica Cariati, Valentina Preziosi, Antonella Panarelli, Ida Strina, Carlo Alviggi, Stefano Guido","doi":"10.1007/s00397-026-01569-4","DOIUrl":"10.1007/s00397-026-01569-4","url":null,"abstract":"<div><p>Human semen is a complex biological fluid whose rheological properties are relevant to male fertility and assisted reproductive technologies. Standard clinical assessment is largely qualitative and operator dependent, motivating the search for objective biophysical markers of semen quality. Although normospermic semen is commonly assumed to behave as a low viscosity Newtonian fluid after liquefaction, we previously demonstrated a viscoelastic response consistent with weak gel-like behaviour. Here, we extend this analysis to 62 semen samples from infertility-diagnosed individuals and compare their rheological behaviour with normospermic samples. Both groups display similar steady shear viscosity and weak-gel characteristics in oscillatory measurements, but statistically significant differences in G″ at high frequencies, indicating altered microstructural dynamics in abnormal samples. Different correlations between rheological parameters and sperm motility are also found. These findings show that clinically relevant differences in semen rheology emerge under oscillatory conditions and support viscoelasticity as a complementary metric to conventional semen analysis.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"65 6","pages":"495 - 502"},"PeriodicalIF":3.0,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009517","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