Coil-stretch transition
WebMar 17, 2024 · Polymer molecules in a flow undergo a coil-stretch phase transition on an increase of the velocity gradients. Model-independent identification and characterization … Webexceeds a critical threshold. This phenomenon is known as the coil{stretch transition [1] and is observed in both laminar [2, 3] and random ows [4{6], even though with partially di erent features in the two cases. Several observables have been used to characterize the coil{stretch transition. A natural quantity is the steady-state distribution of
Coil-stretch transition
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WebApr 29, 2024 · We found a transient state with stretch-coil coexistence among polymers in the stress relaxation process. Further structure analysis revealed a scenario of local jamming at the transient state, resulting in an entropy barrier for stretch-coil transition of partial polymers. WebVarious statistical quantities characterizing the ensemble of polymers, such as the mean, variance, autocorrelation time, and probability density function of the end …
WebAug 22, 2003 · Because the hydrodynamic interactions are reduced by stretching, a solute polymer coil should unwind abruptly when a certain critical value of the velocity gradient … WebAug 24, 2024 · The coil-stretch transition and the tumbling instability are characterized as a function of three parameters: the Péclet number, the Stokes number, and the chain length. Numerical results show that the coil-stretch transition remains when inertia is present and that it depends nonlinearly on the Stokes and Péclet numbers. Theoretical and ...
WebNov 20, 2024 · In contrast, the solutions of semi-flexible HEC show a monotonic increase in extensional rate in response to rising interfacial stress in pinching filament, implying that … WebJun 8, 2024 · The purpose of this study is to develop a simple system for examining changes in microstructure (i.e., the orientational state and coil-stretch transition of …
WebJun 4, 1998 · We use Brownian dynamics simulation to study coil–stretch transition of macromolecules in solution. Into a simple elongational flow field, we introduce freely jointed bead-rod chain model molecules in their coiled and stretched states, and follow the conformational changes. We find good agreement of our simulation results with the …
WebStatistical mechanics of coil-hairpin transition in a single stranded DNA oligomer arXiv:cond-mat/0701368v1 [cond-mat.stat-mech] 16 Jan 2007 Sanjay Kumar, Debaprasad Giri† and Yashwant Singh Department of Physics, Banaras Hindu University, Varanasi 221 005, India, † Physics Section, MMV, Banaras Hindu University, Varanasi 221 005, India. telah berangkat drop point j&tWeb@article{osti_6657608, title = {Coil-stretch transition of dilute flexible polymers under ultrahigh velocity gradients}, author = {De Gennes, P G}, abstractNote = {Because the … telah bahasa inggrisnya adalahWebA unique feature of the coil–stretch transition is the critical slowdown in polymer dynamics toward steady state that is accompanied by enhanced molecule extension fluctuations. … telah berangkat drop point slawiWebCoil–stretch-like transition of elastic sheets in extensional flows Yijiang Yu a and Michael D. Graham *a Author affiliations Abstract The conformation of a long linear polymer dissolved in fluid and exposed to an extensional flow is well-known to exhibit a “coil–stretch” transition, which for sufficiently long chains can lead to bistability. telah berlaku in englishWebFeb 22, 1999 · The coil–stretch transition is observed when the elongational rate, ε̇ exceeds a certain critical value ε̇ c. In this work, we describe in detail the simulation procedure and how to extract polymer dimensions, solution viscosity, and birefringence from the trajectories. telah berlaluWebMar 30, 2024 · These DPD simulations demonstrate that a flow-induced coil-stretch transition (CST) and its associated hysteresis caused by configurational microphase separation, as observed in previous NEMD simulations of PEF, can be replicated using a more computationally efficient coarse-grained system. telah berlangsung in englishWebJan 25, 2024 · In systems with extensile dipoles, however, our simulations uncover an active coil-stretch transition whereby the polymer spontaneously unfolds and stretches out in its own self-induced hydrodynamic flow, and we characterize this transition in terms of a … telah berpulang