Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study
Complex colloidal fluids, depending on constituent shapes and packing fractions, may have a wide range of shear-thinning and/or shear-thickening behaviors. An interesting way to transition between different types of such behavior is by infusing complex functional particles that can be manufactured u...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/14/22/6867 |
| _version_ | 1797509564046770176 |
|---|---|
| author | Rofiques Salehin Rong-Guang Xu Stefanos Papanikolaou |
| author_facet | Rofiques Salehin Rong-Guang Xu Stefanos Papanikolaou |
| author_sort | Rofiques Salehin |
| collection | DOAJ |
| description | Complex colloidal fluids, depending on constituent shapes and packing fractions, may have a wide range of shear-thinning and/or shear-thickening behaviors. An interesting way to transition between different types of such behavior is by infusing complex functional particles that can be manufactured using modern techniques such as 3D printing. In this paper, we perform 2D molecular dynamics simulations of such fluids with infused star-shaped functional particles, with a variable leg length and number of legs, as they are infused in a non-interacting fluid. We vary the packing fraction (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ϕ</mi></semantics></math></inline-formula>) of the system, and for each different system, we apply shear at various strain rates, turning the fluid into a shear-thickened fluid and then, in jammed state, rising the apparent viscosity of the fluid and incipient stresses. We demonstrate the dependence of viscosity on the functional particles’ packing fraction and we show the role of shape and design dependence of the functional particles towards the transition to a shear-thickening fluid. |
| first_indexed | 2024-03-10T05:19:34Z |
| format | Article |
| id | doaj.art-3b349fa1480d429e9d45bc6c9f9606e6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:19:34Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-3b349fa1480d429e9d45bc6c9f9606e62023-11-23T00:10:01ZengMDPI AGMaterials1996-19442021-11-011422686710.3390/ma14226867Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics StudyRofiques Salehin0Rong-Guang Xu1Stefanos Papanikolaou2Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USADepartment of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USANOMATEN Centre of Excellence, National Centre of Nuclear Research, A. Soltana 7, 05-400 Otwock, PolandComplex colloidal fluids, depending on constituent shapes and packing fractions, may have a wide range of shear-thinning and/or shear-thickening behaviors. An interesting way to transition between different types of such behavior is by infusing complex functional particles that can be manufactured using modern techniques such as 3D printing. In this paper, we perform 2D molecular dynamics simulations of such fluids with infused star-shaped functional particles, with a variable leg length and number of legs, as they are infused in a non-interacting fluid. We vary the packing fraction (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ϕ</mi></semantics></math></inline-formula>) of the system, and for each different system, we apply shear at various strain rates, turning the fluid into a shear-thickened fluid and then, in jammed state, rising the apparent viscosity of the fluid and incipient stresses. We demonstrate the dependence of viscosity on the functional particles’ packing fraction and we show the role of shape and design dependence of the functional particles towards the transition to a shear-thickening fluid.https://www.mdpi.com/1996-1944/14/22/6867molecular dynamicsfunctional particlesjammingshear thickeningviscositydiffusivity |
| spellingShingle | Rofiques Salehin Rong-Guang Xu Stefanos Papanikolaou Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study Materials molecular dynamics functional particles jamming shear thickening viscosity diffusivity |
| title | Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study |
| title_full | Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study |
| title_fullStr | Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study |
| title_full_unstemmed | Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study |
| title_short | Colloidal Shear-Thickening Fluids Using Variable Functional Star-Shaped Particles: A Molecular Dynamics Study |
| title_sort | colloidal shear thickening fluids using variable functional star shaped particles a molecular dynamics study |
| topic | molecular dynamics functional particles jamming shear thickening viscosity diffusivity |
| url | https://www.mdpi.com/1996-1944/14/22/6867 |
| work_keys_str_mv | AT rofiquessalehin colloidalshearthickeningfluidsusingvariablefunctionalstarshapedparticlesamoleculardynamicsstudy AT rongguangxu colloidalshearthickeningfluidsusingvariablefunctionalstarshapedparticlesamoleculardynamicsstudy AT stefanospapanikolaou colloidalshearthickeningfluidsusingvariablefunctionalstarshapedparticlesamoleculardynamicsstudy |