Apparatus for Neutron Scattering Measurements on Sheared Fluids

Area of Science:

• Materials Science
• Fluid Dynamics
• Neutron Scattering Physics

Background:

• Understanding fluid behavior under shear is crucial for various industrial processes.
• Neutron scattering offers unique insights into material structure and dynamics at the molecular level.
• Existing techniques may have limitations in studying dynamic processes like shear flow.

Purpose of the Study:

• To design and construct a novel apparatus for in-situ neutron scattering measurements of fluids under shear.
• To integrate this apparatus with existing neutron scattering facilities for user accessibility.
• To enable advanced research into the microstructural evolution of fluids during shear.

Main Methods:

• Development of a specialized shear cell compatible with neutron scattering instruments.
• Integration of the shear cell with the cold neutron small-angle-neutron-scattering (SANS) spectrometer at the NIST research reactor.
• Testing and validation of the apparatus performance under controlled shear conditions.

Main Results:

• Successful construction and integration of a shear apparatus for neutron scattering.
• Demonstrated capability to perform small-angle-neutron-scattering (SANS) measurements on sheared fluids.
• The apparatus is confirmed to be a functional and reliable component of the NIST facility.

Conclusions:

• The developed apparatus significantly advances the capability to study sheared fluids using neutron scattering.
• This new tool will facilitate fundamental research in fluid dynamics and materials science.
• The permanent availability of this apparatus at NIST will foster collaborative research and innovation.