U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Steven D. Hudson (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 203

Upstream vortex and elastic wave in the viscoelastic flow around a confined cylinder

January 28, 2019
Author(s)
Boyang Qin, Paul Salipante, Steven Hudson, Paulo E. Arratia
The viscoelastic flow past cylinder is a classic benchmark problem that is not completely understood. Using novel holographic particle velocimetry, we report two main discoveries of the elastic instability upstream of a single cylinder in confined channel

Flow fluctuations in wormlike micelle fluids

October 22, 2018
Author(s)
Paul NMN Salipante, Steven Meek, Steven D Hudson
We investigate the unstable flow of wormlike micelle solutions in pressure driven capillary flow, with a focus on the effect of entrance geometry on the fluid fluctuations. The flow is measured at different points in the capillary using particle image

Simultaneous Slit Rheometry and In Situ Neutron Scattering

March 1, 2018
Author(s)
Javen Scott Weston, Daniel P. Seeman, Daniel L. Blair, Paul Salipante, Steven Hudson, Kathleen Weigandt
In situ measurement of fluid structure during flow, e.g., by neutron scattering, is key to understanding the relationship between structure and rheology. For some applications, structures at high shear rates heretofore unreachable are of particular

Protein Adsorption and Layer Formation at the Stainless Steel - Solution Interface Mediates Shear-Induced Particle Formation for an IgG1 Monoclonal Antibody

February 9, 2018
Author(s)
Cavan K. Kalonia, Frank Heinrich, Joseph E. Curtis, Sid Raman, Maria A. Miller, Steven Hudson
Passage of specific protein solutions through certain pumps, tubing, and/or filling nozzles can result in the production of unwanted subvisible protein particles (SVP). In this work, surface mediated SVP formation was investigated. Specifically, the

Microparticle tracking velocimetry as a tool for microfluidic flow measurements

June 7, 2017
Author(s)
Paul NMN Salipante, Steven D Hudson, James W. Schmidt, John D. Wright
The accurate measurement of flows in microfluidic channels is important for commercial and research applications. We compare the accuracy of flow measurement techniques over a wide range flows. Flow measurements made using holographic microparticle

Jetting of a shear banding fluid in a rectangular duct

March 14, 2017
Author(s)
Paul NMN Salipante, Charles A. Little, Steven D Hudson
We report on a jetting flow instability of shear banding worm-like micelle (WLM) solutions in microfluidic channels with rectangular cross-sections over an intermediate volumetric flow regime. Particle tracking methods are used to measure the three

Complex Arrangement of Orthogonal Columns via a Supramolecular Orientational Memory Effect

November 22, 2016
Author(s)
Mihai Peterca, Mohammad Imam, Steven Hudson, Benjamin Partridge, D Sahoo, Paul A. Heiney, M L. Klein, Virgil Percec
Memory effects, including shape, chiral and liquid crystalline, enabled macroscopic materials with novel functions. However, the generation of complex supramolecular nanosystems via memory effects was not investigated. Here we report a cyclotriveratrylene

Jetting Flow of a Shear Banding Fluid

November 20, 2016
Author(s)
Paul NMN Salipante, Charles A. Little, Steven D Hudson
In this video we show the jetting behavior of a shear banding worm-like micelle solution in microfluidic flows. The jetting behavior is characterized by a self-contained portion of the channel where the flow velocity is greater than the surroundings. We

Reversible adsorption kinetics of near surface dimer colloids

August 2, 2016
Author(s)
Paul NMN Salipante, Steven D Hudson
We investigate the effect of shape on reversible adsorption kinetics using colloidal polystyrene dimers near a solid glass surface as a model system. The interaction between colloid and wall is tuned using electrostatic, depletion, and gravity forces to

Rheology of clustering protein solutions

July 5, 2016
Author(s)
Vishnu Dharmaraj, P. Douglas Godfrin, Yun Liu, Steven Hudson
High viscosity is a major challenge with protein therapeutics at extremely high concentration. Understanding the relationship between the concentration of a protein solution and its viscosity as a function of shear rate and temperature is therefore

Depletion-Driven Crystallization of Cubic Colloids Sedimented on a Surface

May 19, 2016
Author(s)
Harold W. Hatch, William P. Krekelberg, Steven D Hudson, Vincent K. Shen
Cubic colloids, sedimented on a surface and immersed in a solution of depletant molecules, were modeled with a family of shapes which smoothly varies from squares to circles. Using Wang-Landau simulations with expanded ensembles, we observe the formation