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.
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.
Take a look at my portfolio. This is a very small sample of my work. If you would like to see examples in your specific industry, please ask.
Thanks for looking!
Kind regards
Tineke
Dokumen tersebut membahas tentang hipertiroidisme yang disebabkan oleh berlebihnya produksi hormon tiroid oleh kelenjar tiroid, yang dapat menyebabkan gejala seperti palpitasi, kelelahan, dan penurunan berat badan."
Dokumen tersebut membahas tentang penyakit inflamasi usus atau inflamatory bowel disease (IBD) yang memiliki dua jenis yaitu kolitis ulseratif dan penyakit Chron dengan gejala utama diare kronik. IBD merupakan penyakit kronis dengan penyebab yang belum diketahui secara pasti dan pengobatannya lebih diarahkan untuk menghambat proses inflamasi.
Dokumen tersebut membahas tentang gagal ginjal kronik yang didefinisikan sebagai kerusakan ginjal lebih dari 3 bulan dengan laju filtrasi glomerulus kurang dari 60 ml/menit/1,73m2. Dokumen ini juga membahas epidemiologi, etiologi, patofisiologi, gejala, diagnosis, pencegahan, penatalaksanaan, dan aspek farmakologi dari gagal ginjal kronik.
Take a look at my portfolio. This is a very small sample of my work. If you would like to see examples in your specific industry, please ask.
Thanks for looking!
Kind regards
Tineke
Dokumen tersebut membahas tentang hipertiroidisme yang disebabkan oleh berlebihnya produksi hormon tiroid oleh kelenjar tiroid, yang dapat menyebabkan gejala seperti palpitasi, kelelahan, dan penurunan berat badan."
Dokumen tersebut membahas tentang penyakit inflamasi usus atau inflamatory bowel disease (IBD) yang memiliki dua jenis yaitu kolitis ulseratif dan penyakit Chron dengan gejala utama diare kronik. IBD merupakan penyakit kronis dengan penyebab yang belum diketahui secara pasti dan pengobatannya lebih diarahkan untuk menghambat proses inflamasi.
Dokumen tersebut membahas tentang gagal ginjal kronik yang didefinisikan sebagai kerusakan ginjal lebih dari 3 bulan dengan laju filtrasi glomerulus kurang dari 60 ml/menit/1,73m2. Dokumen ini juga membahas epidemiologi, etiologi, patofisiologi, gejala, diagnosis, pencegahan, penatalaksanaan, dan aspek farmakologi dari gagal ginjal kronik.
This document contains 4 sections that each have 4 paragraphs. The sections discuss different topics related to education, including classroom structure, subjects, schedules, and educational goals. Specifically, the paragraphs describe the layout of classrooms, list the core subjects taught, outline daily schedules, and define the intended outcomes of the educational program.
