Modeling the effect of surface roughness on slip flow in nanoscale polymer filmsNikolai Priezjev
The slip phenomena in thin polymer films confined by either flat or periodically corrugated surfaces are investigated by molecular dynamics and continuum simulations. For atomically flat surfaces and weak wall-fluid interactions, the shear rate dependence of the slip length has a distinct local minimum which is followed by a rapid increase at higher shear rates. For corrugated surfaces with wavelength larger than the radius of gyration of polymer chains, the effective slip length decays
monotonically with increasing corrugation amplitude. At small amplitudes, this decay is reproduced accurately by the numerical solution of the Stokes equation with constant and rate-dependent local slip length. When the corrugation wavelength is comparable to the radius of gyration, the continuum predictions overestimate the effective slip length obtained from molecular dynamics simulations. The analysis of the conformational properties indicates that polymer chains tend to stretch in the direction of shear flow above the crests of the wavy surface.
This presentation was held at the Atlassian & Java User Group Joint Event about Scrum & electronic tool support. It contains an introduction into Scrum, some tooling principles and an evaluation process for Scrum tools.
Modeling the effect of surface roughness on slip flow in nanoscale polymer filmsNikolai Priezjev
The slip phenomena in thin polymer films confined by either flat or periodically corrugated surfaces are investigated by molecular dynamics and continuum simulations. For atomically flat surfaces and weak wall-fluid interactions, the shear rate dependence of the slip length has a distinct local minimum which is followed by a rapid increase at higher shear rates. For corrugated surfaces with wavelength larger than the radius of gyration of polymer chains, the effective slip length decays
monotonically with increasing corrugation amplitude. At small amplitudes, this decay is reproduced accurately by the numerical solution of the Stokes equation with constant and rate-dependent local slip length. When the corrugation wavelength is comparable to the radius of gyration, the continuum predictions overestimate the effective slip length obtained from molecular dynamics simulations. The analysis of the conformational properties indicates that polymer chains tend to stretch in the direction of shear flow above the crests of the wavy surface.
This presentation was held at the Atlassian & Java User Group Joint Event about Scrum & electronic tool support. It contains an introduction into Scrum, some tooling principles and an evaluation process for Scrum tools.
Apresentação realizada em 2007, por Claudia Siebert e Sandra Momm Schult, no Seminário Neur, sobre a Participação da FURB na Revisão do Plano Diretor de Itajaí.
Trade Negotiations are critical in success of marketing process. This workshop focuses on some negotiating skills, necessary to succeed in any type of Negotiation. During the workshop, participants also watch scenes from movies such as Negotiator, Bridge of Spies, Margin Call and Kingdom of heaven to watch some of great cinema scenes on Negotiations.
This presentation prepared for Trade Promotion Organization of Iran. The participants are government officers who are going to promote their activities.
"Thu Vien Sach Co Khi" – Thiết kế khuôn ép phunThu Vien Co Khi
http://facebook.com/thuviensachcokhi - “LIKE” Ngay hôm nay để không bỏ lỡ những chủ đề thú vị, Những quyển sách, tài liệu hay mà bạn đang cần tìm, Cơ hội được trải nghiệm khả năng và Tăng thêm thu nhập.
Apresentação realizada em 2007, por Claudia Siebert e Sandra Momm Schult, no Seminário Neur, sobre a Participação da FURB na Revisão do Plano Diretor de Itajaí.
Trade Negotiations are critical in success of marketing process. This workshop focuses on some negotiating skills, necessary to succeed in any type of Negotiation. During the workshop, participants also watch scenes from movies such as Negotiator, Bridge of Spies, Margin Call and Kingdom of heaven to watch some of great cinema scenes on Negotiations.
This presentation prepared for Trade Promotion Organization of Iran. The participants are government officers who are going to promote their activities.
"Thu Vien Sach Co Khi" – Thiết kế khuôn ép phunThu Vien Co Khi
http://facebook.com/thuviensachcokhi - “LIKE” Ngay hôm nay để không bỏ lỡ những chủ đề thú vị, Những quyển sách, tài liệu hay mà bạn đang cần tìm, Cơ hội được trải nghiệm khả năng và Tăng thêm thu nhập.
كتاب تعليمي للغة السي بلس بلس الكتاب مشروح باللغة العربية لتسهيل التعليم مع أمثلة و شروحات بسيطة جدا طریقة الشرح في ھذا الكتاب ھي طریقة تطبیقیة بحتة بحیث يبدأ بالكود ثم شرح كل كبیرة وصغیرة موجودة فیه وھذه الطریقة أسرع في الفھم وأسھل في التعلم وتضیف فھم عمیق للغة مقارنة بطریقة الشرح التقلیدیة , ھذا العمل موجه إلى فئة المبتدئین مع السي
