Geodesic
Incompressible fluid problems on embedded surfaces: Modeling and variational formulations
Thomas Jankuhn1 ; Maxim A. Olshanskii2 ; Arnold Reusken1
1RWTH Aachen, Germany
2University of Houston, USA
Interfaces and free boundaries, Tome 20 (2018) no. 3, pp. 353-377

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DOI

Governing equations of motion for a viscous incompressible material surface are derived from the balance laws of continuum mechanics. The surface is treated as a time-dependent smooth orientable manifold of codimension one in an ambient Euclidian space. We use elementary tangential calculus to derive the governing equations in terms of exterior differential operators in Cartesian coordinates. The resulting equations can be seen as the Navier–Stokes equations posed on an evolving manifold. We consider a splitting of the surface Navier–Stokes system into coupled equations for the tangential and normal motions of the material surface. We then restrict ourselves to the case of a geometrically stationary manifold of codimension one embedded in Rn. For this case, we present new well-posedness results for the simplified surface fluid model consisting of the surface Stokes equations. Finally, we propose and analyze several alternative variational formulations for this surface Stokes problem, including constrained and penalized formulations, which are convenient for Galerkin discretization methods.
DOI : 10.4171/ifb/405
Classification : 35-XX, 37-XX, 76-XX
Mots-clés : Fluids on surfaces, viscous material interface, fluidic membrane, Navier–Stokes equations on manifolds

Thomas Jankuhn  1   ; Maxim A. Olshanskii  2   ; Arnold Reusken  1

1 RWTH Aachen, Germany
2 University of Houston, USA 
Thomas Jankuhn; Maxim A. Olshanskii; Arnold Reusken. Incompressible fluid problems on embedded surfaces: Modeling and variational formulations. Interfaces and free boundaries, Tome 20 (2018) no. 3, pp. 353-377. doi: 10.4171/ifb/405
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     title = {Incompressible fluid problems on embedded surfaces: {Modeling} and variational formulations},
     journal = {Interfaces and free boundaries},
     pages = {353--377},
     year = {2018},
     volume = {20},
     number = {3},
     doi = {10.4171/ifb/405},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ifb/405/}
}
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