modeling and normal stress analysis in viscoelastic damper
In this study we consider PCF (Plane Couette Flow) which is introduced by two parallel planes which have same velocity in opposite direction and the distance between them is filled by viscoelastic fluid. By this way we have modeled viscoelastic damper. The constitutive equation of JS (Johnson-Segalm...
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| Format: | Article |
| Language: | English |
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Islamic Azad University-Isfahan (Khorasgan) Branch
2013-03-01
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| Series: | International Journal of Advanced Design and Manufacturing Technology |
| Online Access: | https://admt.isfahan.iau.ir/article_534827_d9110a061b361057206035f921fe6baf.pdf |
| _version_ | 1797657225309716480 |
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| author | Mohamad Eskafi |
| author_facet | Mohamad Eskafi |
| author_sort | Mohamad Eskafi |
| collection | DOAJ |
| description | In this study we consider PCF (Plane Couette Flow) which is introduced by two parallel planes which have same velocity in opposite direction and the distance between them is filled by viscoelastic fluid. By this way we have modeled viscoelastic damper. The constitutive equation of JS (Johnson-Segalman) has been used for dynamic analysis of viscoelastic damper’s behavior. By using this equation we can examine normal stress which is existed in the fluid and achieve more accurate results about stability of flow between two planes. At first problem formulation is covered. The general conservation and constitutive equations, as well as the boundary and initial conditions are covered for a JS fluid. The Galerkin projection is applied, using Chandrasekhar functions, for 1-D disturbance from the base (Couette) flow. An arbitrary number of modes are included, to lowest order, the formulation leads to a six-dimensional system. Linear stability analysis around the base flow and nontrivial steady-state solution branches is carried out. The influence of inertia on transient flow is studied. Discussion and concluding remarks are finally given. This study has been done specially for PCF of fluids with high molecular weight such as combination of a Newtonian solvent and a polymer solute. |
| first_indexed | 2024-03-11T17:42:26Z |
| format | Article |
| id | doaj.art-faf28d027e7a401fa7fd5eeaab5471e0 |
| institution | Directory Open Access Journal |
| issn | 2252-0406 2383-4447 |
| language | English |
| last_indexed | 2024-03-11T17:42:26Z |
| publishDate | 2013-03-01 |
| publisher | Islamic Azad University-Isfahan (Khorasgan) Branch |
| record_format | Article |
| series | International Journal of Advanced Design and Manufacturing Technology |
| spelling | doaj.art-faf28d027e7a401fa7fd5eeaab5471e02023-10-18T09:43:43ZengIslamic Azad University-Isfahan (Khorasgan) BranchInternational Journal of Advanced Design and Manufacturing Technology2252-04062383-44472013-03-0161534827modeling and normal stress analysis in viscoelastic damperMohamad EskafiIn this study we consider PCF (Plane Couette Flow) which is introduced by two parallel planes which have same velocity in opposite direction and the distance between them is filled by viscoelastic fluid. By this way we have modeled viscoelastic damper. The constitutive equation of JS (Johnson-Segalman) has been used for dynamic analysis of viscoelastic damper’s behavior. By using this equation we can examine normal stress which is existed in the fluid and achieve more accurate results about stability of flow between two planes. At first problem formulation is covered. The general conservation and constitutive equations, as well as the boundary and initial conditions are covered for a JS fluid. The Galerkin projection is applied, using Chandrasekhar functions, for 1-D disturbance from the base (Couette) flow. An arbitrary number of modes are included, to lowest order, the formulation leads to a six-dimensional system. Linear stability analysis around the base flow and nontrivial steady-state solution branches is carried out. The influence of inertia on transient flow is studied. Discussion and concluding remarks are finally given. This study has been done specially for PCF of fluids with high molecular weight such as combination of a Newtonian solvent and a polymer solute.https://admt.isfahan.iau.ir/article_534827_d9110a061b361057206035f921fe6baf.pdf |
| spellingShingle | Mohamad Eskafi modeling and normal stress analysis in viscoelastic damper International Journal of Advanced Design and Manufacturing Technology |
| title | modeling and normal stress analysis in viscoelastic damper |
| title_full | modeling and normal stress analysis in viscoelastic damper |
| title_fullStr | modeling and normal stress analysis in viscoelastic damper |
| title_full_unstemmed | modeling and normal stress analysis in viscoelastic damper |
| title_short | modeling and normal stress analysis in viscoelastic damper |
| title_sort | modeling and normal stress analysis in viscoelastic damper |
| url | https://admt.isfahan.iau.ir/article_534827_d9110a061b361057206035f921fe6baf.pdf |
| work_keys_str_mv | AT mohamadeskafi modelingandnormalstressanalysisinviscoelasticdamper |