Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Paşa, Gelu"'
Autor:
Paşa, Gelu
We study the linear stability of the displacement of three Stokes fluids with constant viscosity in a porous medium when the middle fluid is contained in a bounded region. We use the Hele-Shaw model. The eigenfunctions of the stability system are the
Externí odkaz:
http://arxiv.org/abs/2211.03519
Autor:
Pasa, Gelu I.
We study the displacement of three immiscible Stokes fluids with constant viscosities in a porous medium. The middle-layer fluid is contained in a bounded region. We give an analysis of the linear stability of this process. This stability problem has
Externí odkaz:
http://arxiv.org/abs/2203.11150
Autor:
Paşa, Gelu
We consider a well-posed eigenvalue problem on $(a,0)$, depending on a continuous function $m$. The boundary conditions in the points $a,0$ are depending on the eigenvalues. We divide $(a,0)$ into small intervals and approximate the function $m$ by a
Externí odkaz:
http://arxiv.org/abs/2110.05245
Autor:
Paşa}, Gelu
An useful approximation for the displacement of two immiscible fluids in a porous medium is the Hele-Shaw model. We consider several liquids with different constant viscosities, inserted between the displacing fluids. The linear stability analysis of
Externí odkaz:
http://arxiv.org/abs/2008.12561
Autor:
Paşa, Gelu
We study the effects of some injection policies used in oil recovery process. The Saffman-Taylor instability occurs when a less viscous fluid is displacing a more viscous one, in a rectangular Hele-Shaw cell. The injection of $N$ successive intermedi
Externí odkaz:
http://arxiv.org/abs/1910.03576
Autor:
Paşa, Gelu I.
Publikováno v:
Ann Univ Ferrara (2019)
The Saffman-Taylor instability occurs when { a} Stokes fluid is displaced by a less viscous one { in} a Hele-Shaw cell. { This model is useful to study the secondary oil recovery from a pororus medum.} Since 1960, { polymer solutions} were used as di
Externí odkaz:
http://arxiv.org/abs/1903.08407
Autor:
Paşa, Gelu
The Saffman-Taylor instability occurs when a less viscous fluid is displacing a more viscous one in a rectangular Hele-Shaw cell. A surface tension on the interface between the two fluids is improving the stability. The multi-layer Hele - Shaw model,
Externí odkaz:
http://arxiv.org/abs/1903.01455
Autor:
Paşa, Gelu
We study the Hele-Shaw immiscible displacements when all surfaces tensions on the interfaces are zero. The Saffman-Taylor instability occurs when a less viscous fluid is displacing a more viscous one, in a rectangular Hele-Shaw cell. We prove that an
Externí odkaz:
http://arxiv.org/abs/1807.06591
Autor:
Paşa Gelu
Publikováno v:
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, Vol 26, Iss 2, Pp 193-207 (2018)
We study the linear stability of the immiscible displacement of some fluids in 2D and 3D Hele-Shaw cell. We give a method for avoiding the singularities phenomenons which appears in previous papers. In the case of a non - Newtonian fluid displaced by
Externí odkaz:
https://doaj.org/article/111b7c02eb4349d080cda9f41fa1566b
Autor:
Paşa, Gelu1 pasa.gelu@gmail.com
Publikováno v:
ROMAI Journal. 2021, Vol. 17 Issue 2, p65-72. 8p.