---
_id: '14042'
abstract:
- lang: eng
  text: Long-time and large-data existence of weak solutions for initial- and boundary-value
    problems concerning three-dimensional flows of incompressible fluids is nowadays
    available not only for Navier–Stokes fluids but also for various fluid models
    where the relation between the Cauchy stress tensor and the symmetric part of
    the velocity gradient is nonlinear. The majority of such studies however concerns
    models where such a dependence is explicit (the stress is a function of the velocity
    gradient), which makes the class of studied models unduly restrictive. The same
    concerns boundary conditions, or more precisely the slipping mechanisms on the
    boundary, where the no-slip is still the most preferred condition considered in
    the literature. Our main objective is to develop a robust mathematical theory
    for unsteady internal flows of implicitly constituted incompressible fluids with
    implicit relations between the tangential projections of the velocity and the
    normal traction on the boundary. The theory covers numerous rheological models
    used in chemistry, biorheology, polymer and food industry as well as in geomechanics.
    It also includes, as special cases, nonlinear slip as well as stick–slip boundary
    conditions. Unlike earlier studies, the conditions characterizing admissible classes
    of constitutive equations are expressed by means of tools of elementary calculus.
    In addition, a fully constructive proof (approximation scheme) is incorporated.
    Finally, we focus on the question of uniqueness of such weak solutions.
acknowledgement: "M. Bulíček and J. Málek acknowledge the support of the project No.
  20-11027X financed by the Czech Science foundation (GAČR). M. Bulíček and J. Málek
  are members of the Nečas Center for Mathematical Modelling.\r\nOpen access publishing
  supported by the National Technical Library in Prague."
article_number: '72'
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Miroslav
  full_name: Bulíček, Miroslav
  last_name: Bulíček
- first_name: Josef
  full_name: Málek, Josef
  last_name: Málek
- first_name: Erika
  full_name: Maringová, Erika
  id: dbabca31-66eb-11eb-963a-fb9c22c880b4
  last_name: Maringová
citation:
  ama: Bulíček M, Málek J, Maringová E. On unsteady internal flows of incompressible
    fluids characterized by implicit constitutive equations in the bulk and on the
    boundary. <i>Journal of Mathematical Fluid Mechanics</i>. 2023;25(3). doi:<a href="https://doi.org/10.1007/s00021-023-00803-w">10.1007/s00021-023-00803-w</a>
  apa: Bulíček, M., Málek, J., &#38; Maringová, E. (2023). On unsteady internal flows
    of incompressible fluids characterized by implicit constitutive equations in the
    bulk and on the boundary. <i>Journal of Mathematical Fluid Mechanics</i>. Springer
    Nature. <a href="https://doi.org/10.1007/s00021-023-00803-w">https://doi.org/10.1007/s00021-023-00803-w</a>
  chicago: Bulíček, Miroslav, Josef Málek, and Erika Maringová. “On Unsteady Internal
    Flows of Incompressible Fluids Characterized by Implicit Constitutive Equations
    in the Bulk and on the Boundary.” <i>Journal of Mathematical Fluid Mechanics</i>.
    Springer Nature, 2023. <a href="https://doi.org/10.1007/s00021-023-00803-w">https://doi.org/10.1007/s00021-023-00803-w</a>.
  ieee: M. Bulíček, J. Málek, and E. Maringová, “On unsteady internal flows of incompressible
    fluids characterized by implicit constitutive equations in the bulk and on the
    boundary,” <i>Journal of Mathematical Fluid Mechanics</i>, vol. 25, no. 3. Springer
    Nature, 2023.
  ista: Bulíček M, Málek J, Maringová E. 2023. On unsteady internal flows of incompressible
    fluids characterized by implicit constitutive equations in the bulk and on the
    boundary. Journal of Mathematical Fluid Mechanics. 25(3), 72.
  mla: Bulíček, Miroslav, et al. “On Unsteady Internal Flows of Incompressible Fluids
    Characterized by Implicit Constitutive Equations in the Bulk and on the Boundary.”
    <i>Journal of Mathematical Fluid Mechanics</i>, vol. 25, no. 3, 72, Springer Nature,
    2023, doi:<a href="https://doi.org/10.1007/s00021-023-00803-w">10.1007/s00021-023-00803-w</a>.
  short: M. Bulíček, J. Málek, E. Maringová, Journal of Mathematical Fluid Mechanics
    25 (2023).
date_created: 2023-08-13T22:01:13Z
date_published: 2023-08-01T00:00:00Z
date_updated: 2023-12-13T12:08:08Z
day: '01'
ddc:
- '510'
department:
- _id: JuFi
doi: 10.1007/s00021-023-00803-w
external_id:
  arxiv:
  - '2301.12834'
  isi:
  - '001040354900001'
file:
- access_level: open_access
  checksum: c549cd8f0dd02ed60477a05ca045f481
  content_type: application/pdf
  creator: dernst
  date_created: 2023-08-14T07:24:17Z
  date_updated: 2023-08-14T07:24:17Z
  file_id: '14046'
  file_name: 2023_JourMathFluidMech_Bulicek.pdf
  file_size: 845748
  relation: main_file
  success: 1
file_date_updated: 2023-08-14T07:24:17Z
has_accepted_license: '1'
intvolume: '        25'
isi: 1
issue: '3'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
publication: Journal of Mathematical Fluid Mechanics
publication_identifier:
  eissn:
  - 1422-6952
  issn:
  - 1422-6928
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: On unsteady internal flows of incompressible fluids characterized by implicit
  constitutive equations in the bulk and on the boundary
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 25
year: '2023'
...
---
_id: '10575'
abstract:
- lang: eng
  text: The choice of the boundary conditions in mechanical problems has to reflect
    the interaction of the considered material with the surface. Still the assumption
    of the no-slip condition is preferred in order to avoid boundary terms in the
    analysis and slipping effects are usually overlooked. Besides the “static slip
    models”, there are phenomena that are not accurately described by them, e.g. at
    the moment when the slip changes rapidly, the wall shear stress and the slip can
    exhibit a sudden overshoot and subsequent relaxation. When these effects become
    significant, the so-called dynamic slip phenomenon occurs. We develop a mathematical
    analysis of Navier–Stokes-like problems with a dynamic slip boundary condition,
    which requires a proper generalization of the Gelfand triplet and the corresponding
    function space setting.
acknowledgement: The research of A. Abbatiello is supported by Einstein Foundation,
  Berlin. A. Abbatiello is also member of the Italian National Group for the Mathematical
  Physics (GNFM) of INdAM. M. Bulíček acknowledges the support of the project No.
  20-11027X financed by Czech Science Foundation (GACR). M. Bulíček is member of the
  Jindřich Nečas Center for Mathematical Modelling. E. Maringová acknowledges support
  from Charles University Research program UNCE/SCI/023, the grant SVV-2020-260583
  by the Ministry of Education, Youth and Sports, Czech Republic and from the Austrian
  Science Fund (FWF), grants P30000, W1245, and F65.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Anna
  full_name: Abbatiello, Anna
  last_name: Abbatiello
- first_name: Miroslav
  full_name: Bulíček, Miroslav
  last_name: Bulíček
- first_name: Erika
  full_name: Maringová, Erika
  id: dbabca31-66eb-11eb-963a-fb9c22c880b4
  last_name: Maringová
citation:
  ama: Abbatiello A, Bulíček M, Maringová E. On the dynamic slip boundary condition
    for Navier-Stokes-like problems. <i>Mathematical Models and Methods in Applied
    Sciences</i>. 2021;31(11):2165-2212. doi:<a href="https://doi.org/10.1142/S0218202521500470">10.1142/S0218202521500470</a>
  apa: Abbatiello, A., Bulíček, M., &#38; Maringová, E. (2021). On the dynamic slip
    boundary condition for Navier-Stokes-like problems. <i>Mathematical Models and
    Methods in Applied Sciences</i>. World Scientific Publishing. <a href="https://doi.org/10.1142/S0218202521500470">https://doi.org/10.1142/S0218202521500470</a>
  chicago: Abbatiello, Anna, Miroslav Bulíček, and Erika Maringová. “On the Dynamic
    Slip Boundary Condition for Navier-Stokes-like Problems.” <i>Mathematical Models
    and Methods in Applied Sciences</i>. World Scientific Publishing, 2021. <a href="https://doi.org/10.1142/S0218202521500470">https://doi.org/10.1142/S0218202521500470</a>.
  ieee: A. Abbatiello, M. Bulíček, and E. Maringová, “On the dynamic slip boundary
    condition for Navier-Stokes-like problems,” <i>Mathematical Models and Methods
    in Applied Sciences</i>, vol. 31, no. 11. World Scientific Publishing, pp. 2165–2212,
    2021.
  ista: Abbatiello A, Bulíček M, Maringová E. 2021. On the dynamic slip boundary condition
    for Navier-Stokes-like problems. Mathematical Models and Methods in Applied Sciences.
    31(11), 2165–2212.
  mla: Abbatiello, Anna, et al. “On the Dynamic Slip Boundary Condition for Navier-Stokes-like
    Problems.” <i>Mathematical Models and Methods in Applied Sciences</i>, vol. 31,
    no. 11, World Scientific Publishing, 2021, pp. 2165–212, doi:<a href="https://doi.org/10.1142/S0218202521500470">10.1142/S0218202521500470</a>.
  short: A. Abbatiello, M. Bulíček, E. Maringová, Mathematical Models and Methods
    in Applied Sciences 31 (2021) 2165–2212.
date_created: 2021-12-26T23:01:27Z
date_published: 2021-10-13T00:00:00Z
date_updated: 2025-04-15T08:31:30Z
day: '13'
ddc:
- '510'
department:
- _id: JuFi
doi: 10.1142/S0218202521500470
external_id:
  arxiv:
  - '2009.09057'
  isi:
  - '000722309400001'
file:
- access_level: open_access
  checksum: 8c0a9396335f0b70e1f5cbfe450a987a
  content_type: application/pdf
  creator: dernst
  date_created: 2022-05-16T10:55:45Z
  date_updated: 2022-05-16T10:55:45Z
  file_id: '11385'
  file_name: 2021_MathModelsMethods_Abbatiello.pdf
  file_size: 795483
  relation: main_file
  success: 1
file_date_updated: 2022-05-16T10:55:45Z
has_accepted_license: '1'
intvolume: '        31'
isi: 1
issue: '11'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
page: 2165-2212
project:
- _id: fc31cba2-9c52-11eb-aca3-ff467d239cd2
  grant_number: F6504
  name: Taming Complexity in Partial Differential Systems
- _id: 260788DE-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: W1245
  name: Dissipation and dispersion in nonlinear partial differential equations
publication: Mathematical Models and Methods in Applied Sciences
publication_identifier:
  eissn:
  - 1793-6314
  issn:
  - 0218-2025
publication_status: published
publisher: World Scientific Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: On the dynamic slip boundary condition for Navier-Stokes-like problems
tmp:
  image: /images/cc_by_nc_nd.png
  legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
  name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
    (CC BY-NC-ND 4.0)
  short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 31
year: '2021'
...
---
_id: '10005'
abstract:
- lang: eng
  text: We study systems of nonlinear partial differential equations of parabolic
    type, in which the elliptic operator is replaced by the first-order divergence
    operator acting on a flux function, which is related to the spatial gradient of
    the unknown through an additional implicit equation. This setting, broad enough
    in terms of applications, significantly expands the paradigm of nonlinear parabolic
    problems. Formulating four conditions concerning the form of the implicit equation,
    we first show that these conditions describe a maximal monotone p-coercive graph.
    We then establish the global-in-time and large-data existence of a (weak) solution
    and its uniqueness. To this end, we adopt and significantly generalize Minty’s
    method of monotone mappings. A unified theory, containing several novel tools,
    is developed in a way to be tractable from the point of view of numerical approximations.
acknowledgement: "M. Bulíček and J. Málek acknowledge the support of the project No.
  18-12719S financed by the Czech\r\nScience foundation (GAČR). E. Maringová acknowledges
  support from Charles University Research program \r\nUNCE/SCI/023, the grant SVV-2020-260583
  by the Ministry of Education, Youth and Sports, Czech Republic\r\nand from the Austrian
  Science Fund (FWF), grants P30000, W1245, and F65. M. Bulíček and J. Málek are\r\nmembers
  of the Nečas Center for Mathematical Modelling.\r\n"
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Miroslav
  full_name: Bulíček, Miroslav
  last_name: Bulíček
- first_name: Erika
  full_name: Maringová, Erika
  id: dbabca31-66eb-11eb-963a-fb9c22c880b4
  last_name: Maringová
- first_name: Josef
  full_name: Málek, Josef
  last_name: Málek
citation:
  ama: Bulíček M, Maringová E, Málek J. On nonlinear problems of parabolic type with
    implicit constitutive equations involving flux. <i>Mathematical Models and Methods
    in Applied Sciences</i>. 2021;31(09). doi:<a href="https://doi.org/10.1142/S0218202521500457">10.1142/S0218202521500457</a>
  apa: Bulíček, M., Maringová, E., &#38; Málek, J. (2021). On nonlinear problems of
    parabolic type with implicit constitutive equations involving flux. <i>Mathematical
    Models and Methods in Applied Sciences</i>. World Scientific Publishing. <a href="https://doi.org/10.1142/S0218202521500457">https://doi.org/10.1142/S0218202521500457</a>
  chicago: Bulíček, Miroslav, Erika Maringová, and Josef Málek. “On Nonlinear Problems
    of Parabolic Type with Implicit Constitutive Equations Involving Flux.” <i>Mathematical
    Models and Methods in Applied Sciences</i>. World Scientific Publishing, 2021.
    <a href="https://doi.org/10.1142/S0218202521500457">https://doi.org/10.1142/S0218202521500457</a>.
  ieee: M. Bulíček, E. Maringová, and J. Málek, “On nonlinear problems of parabolic
    type with implicit constitutive equations involving flux,” <i>Mathematical Models
    and Methods in Applied Sciences</i>, vol. 31, no. 09. World Scientific Publishing,
    2021.
  ista: Bulíček M, Maringová E, Málek J. 2021. On nonlinear problems of parabolic
    type with implicit constitutive equations involving flux. Mathematical Models
    and Methods in Applied Sciences. 31(09).
  mla: Bulíček, Miroslav, et al. “On Nonlinear Problems of Parabolic Type with Implicit
    Constitutive Equations Involving Flux.” <i>Mathematical Models and Methods in
    Applied Sciences</i>, vol. 31, no. 09, World Scientific Publishing, 2021, doi:<a
    href="https://doi.org/10.1142/S0218202521500457">10.1142/S0218202521500457</a>.
  short: M. Bulíček, E. Maringová, J. Málek, Mathematical Models and Methods in Applied
    Sciences 31 (2021).
date_created: 2021-09-12T22:01:25Z
date_published: 2021-08-25T00:00:00Z
date_updated: 2025-05-14T10:50:14Z
day: '25'
department:
- _id: JuFi
doi: 10.1142/S0218202521500457
external_id:
  arxiv:
  - '2009.06917'
  isi:
  - '000722222900004'
intvolume: '        31'
isi: 1
issue: '09'
keyword:
- Nonlinear parabolic systems
- implicit constitutive theory
- weak solutions
- existence
- uniqueness
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2009.06917
month: '08'
oa: 1
oa_version: Preprint
project:
- _id: fc31cba2-9c52-11eb-aca3-ff467d239cd2
  grant_number: F6504
  name: Taming Complexity in Partial Differential Systems
publication: Mathematical Models and Methods in Applied Sciences
publication_identifier:
  eissn:
  - 1793-6314
  issn:
  - 0218-2025
publication_status: published
publisher: World Scientific Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: On nonlinear problems of parabolic type with implicit constitutive equations
  involving flux
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 31
year: '2021'
...
