Temat: bioheat transfer - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Application of the control volume method in numerical modeling of cryosurgery treatment
Autorzy:: Szopa, R.
Siedlecki, J.
Powiązania:: https://bibliotekanauki.pl/articles/122277.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
modeling of cryosurgery treatment
control volume method
przepływ ciepła
Opis:: In the paper the problems of cryosurgery treatment are discussed. In particular the heat exchange between external cylindrical cryoprobe and human tissue is analyzed. The cryoprobe tip temperature changes from the initial temperature to the minimal one and back in a linear way (broken line). Thermophysical parameters determining the thermal properties of tissue can be treated as the temperature-dependent functions. The freezing model bases on the approach called ‘a one domain method’, and in the energy equation called a substitute thermal capacity appears. At the stage of computations the control volume method (CVM) is used. In the final part of paper the examples of computations are presented.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 4; 131-136
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Determination of the temperature field in burned and healthy skin tissue using the boundary element method. Part 2
Autorzy:: Freus, K.
Freus, S.
Powiązania:: https://bibliotekanauki.pl/articles/122947.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
Pennes equation
boundary element method
przepływ ciepła
równanie Pennesa
metoda elementów brzegowych
Opis:: In the paper, the position of the boundary between burned and healthy tissue is described by the NURBS curve. The temperature field in the domain is calculated by means of the boundary element method. The influence of discretization on the temperature distribution in the burned and healthy skin tissue is analysed. Different numbers of boundary elements and internal cells are taken into account. In the final part of the paper the examples of computations are shown.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 3; 47-54
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Determination of the temperature field in burned and healthy skin tissue using the boundary element method. Part 1
Autorzy:: Freus, K.
Freus, S.
Majchrzak, E.
Powiązania:: https://bibliotekanauki.pl/articles/123011.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
Pennes equation
boundary element method
przepływ ciepła
równanie Pennesa
metoda elementów brzegowych
Opis:: In the paper the burned and healthy layers of skin tissue are considered. The temperature distribution in these layers is described by the system of two Pennes equations. The governing equations are supplemented by the boundary conditions. On the external surface the Robin condition is known. On the surface between burned and healthy skin the ideal contact is considered, while on the internal surface limiting the system the body temperature is taken into account. The problem is solved by means of the boundary element method.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 3; 39-46
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: 3D model of thermal interactions between human forearm and environment
Autorzy:: Duda, M.
Mochnacki, B.
Powiązania:: https://bibliotekanauki.pl/articles/122811.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
temperature field in forearm domain
finite element method
przepływ biociepła
metoda elementów skończonych
Opis:: Thermal processes in the domain of a human forearm are considered. The external surface of forearm is in the direct thermal contact with the environment. The steady state problem is considered. From the mathematical point of view, the task is described by the system of the Poisson-type equations, the boundary conditions given on the contact surface between tissue sub-domains, the boundary conditions determining heat transfer between blood vessels and tissue and the boundary conditions on the external surface of the system. The non-homogeneous forearm domain is reconstructed as accurately as possible (3D task). At the stage of numerical modelling, the finite element method has been used. In the final part of the paper the example of computations is presented.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2015, 14, 3; 17-23
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Sensitivity analysis of transient bioheat transfer during thermal injury formation of biological tissue
Autorzy:: Jasiński, M.
Powiązania:: https://bibliotekanauki.pl/articles/122465.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
tissue injury integral
tissue injury
sensitivity analysis
przepływ ciepła
uraz tkanki
analiza wrażliwości
Opis:: The sensitivity analysis of the transient temperature field in the 2D tissue domain with respect to its thermophysical parameters is discussed. In particular, the influence of tissue specific heat, thermal conductivity, perfusion rate and metabolic heat source on the temperature distribution is considered. In order to determine the influence of variations of these parameters on temperature distribution, the direct approach of sensitivity analysis is applied. The algorithm of modeling of tissue injury withdrawal based on Arrhenius integral is also presented. At the stage of numerical realization the boundary element method is used. In the final part of paper the results obtained are shown.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 2; 33-42
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Modelling of thermal damage in laser irradiated tissue
Autorzy:: Jasiński, M.
Powiązania:: https://bibliotekanauki.pl/articles/122504.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
Arrhenius scheme
tissue damage
laser irradiation
przepływ biociepła
schemat Arrheniusa
uszkodzenia tkanki
promieniowanie laserowe
Opis:: In the paper the numerical analysis of thermal processes proceeding in the 2D homogeneous biological tissue subjected to laser irradiation is presented. In particular, the influence of necrotic changes in tissue on the values of the perfusion coefficient and effective scattering coefficient are discussed. The transient heat transfer is described by the bioheat transfer equation in the Pennes formulation. As a model of light distribution in tissue, the first-order scattering approach has been used. At the stage of numerical realization the 1st scheme of the boundary element method has been applied.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2015, 14, 4; 67-78
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Temperature field in burned and healthy tissue : sensitivity analysis with respect to the thermal parameters
Autorzy:: Freus, K.
Freus, S.
Majchrzak, E.
Powiązania:: https://bibliotekanauki.pl/articles/122363.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
Pennes equation
boundary element method
burn wounds
przepływ ciepła
równanie Pennesa
metoda elementów brzegowych
rany poparzeniowe
Opis:: A non-homogeneous system being the composition of burn wound and healthy tissue is considered. The heat exchange between sub-domains and environment is described by the system of partial differential equations (the Pennes equations) supplemented by the assumed boundary conditions. Additional problems associated with sensitivity analysis with respect to thermal parameters occurring in the mathematical model are formulated. Both the basic problem and additional ones concerning the sensitivity with respect to selected parameters are solved using the boundary element method. In the final part of the paper the results of computations are shown.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 3; 47-58
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: 1D generalized dual-phase lag equation. Sensitivity analysis with respect to the porosity
Autorzy:: Kałuża, G.
Majchrzak, E.
Turchan, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/123000.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
generalized dual-phase lag model
sensitivity analysis
finite difference method
przepływ biociepła
metoda różnic skończonych
analiza wrażliwości
Opis:: Thermal processes occurring in the heated tissue are described by the 1D generalized dual-phase lag equation supplemented by appropriate boundary and initial conditions. Using the sensitivity analysis method, the additional problem connected with the porosity is formulated. Both problems are solved by means of the explicit scheme of the finite difference method. In this way it is possible to estimate the temperature changes due to the perturbation of porosity. In the final part of the paper, the example of computation is shown and the conclusions are formulated.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2016, 15, 1; 49-58
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Numerical analysis of biological tissue heating using the dual-phase lag equation with temperature – dependent parameters
Autorzy:: Majchrzak, Ewa
Stryczyński, Mikołaj
Powiązania:: https://bibliotekanauki.pl/articles/2202034.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
dual-phase lag model
temperature-dependent parameter
finite difference method
przepływ biociepła
model dwufazowego opóźnienia
metoda różnic skończonych
Opis:: The dual-phase lag equation is formulated for the case when the thermophysical parameters occurring in this equation are temperature-dependent. The axial-symmetrical domain of biological tissue heated by an external heat source is considered. The problem is solved using the implicit scheme of the finite difference method. At the stage of numerical computations, the analytical relationships taken from the literature describing changes in parameters are taken into account.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 3; 85--98
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Numerical modeling of thermal processes in the living tissue domain secured with a layer of protective clothing
Autorzy:: Mochnacki, B.
Majchrzak, E.
Duda, M.
Powiązania:: https://bibliotekanauki.pl/articles/122990.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
protective clothing
modeling of thermal processes
boundary element method
przepływ ciepła
odzież ochronna
modelowanie procesów cieplnych
metoda elementów brzegowych
Opis:: In the paper the problem of thermal processes proceeding in the domain of biological tissue secured with protective clothing is discussed. In particular, the mathematical model of heat exchange corresponding to conditions of high temperature in the system environment - layer of protective clothing - air gap - skin tissue is formulated in the form of a certain boundary - initial problem. Next, the numerical algorithm based on the boundary element method is presented. In the final part of the paper the examples of numerical simulations are shown.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 1; 87-94
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Simplified model of thermal interactions between environment, protective clothing and skin tissue
Autorzy:: Mochnacki, B.
Majchrzak, E.
Duda, M.
Powiązania:: https://bibliotekanauki.pl/articles/123023.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
protective clothing
modeling of thermal processes
finite difference method
wymiana ciepła
odzież ochronna
modelowanie procesów cieplnych
metoda różnic skończonych
Opis:: In the paper the simplified model of thermal processes proceeding in the domain of biological tissue secured with protective clothing is discussed. In particular, the simplification of the mathematical model consists in the omission of the real layer of fabric for which the transient temperature field is determined by the Fourier equation and the introduction in this place of the additional thermal resistance appearing in the boundary condition determining the heat exchange between tissue and environment. In this way both the mathematical model of the thermal processes in the system considered and also numerical realization are greatly simplified. To verify the effectiveness of the approach proposed, the solution of the basic problem and the simplified one have been solved (1D task) using the finite difference method and the results have been compared. It turned out that the results are close and from the practical point of view such simplification is fully acceptable.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 4; 91-96
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Numerical simulation of the heating process in the domain of tissue insulated by protective clothing
Autorzy:: Ciesielski, M.
Mochnacki, B.
Powiązania:: https://bibliotekanauki.pl/articles/122678.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
protective clothing
modeling of thermal processes
control volume method
Voronoi tessellation
przepływ ciepła
odzież ochronna
modelowanie procesów cieplnych
teselacja Voronoia
Opis:: In this paper the 2D heterogeneous tissue domain (forearm cross-section) insulated by a layer of protective clothing is considered. The aim of considerations is to develop an algorithm simulating the tissue heating process resulting from the sudden change of external boundary conditions. Here, the authors exploit a certain version of the control volume method (CVM) using the Voronoi tessellation. The mathematical model of heat exchange in the domain analyzed is formulated in the form of a boundary-initial problem based on the system of partial differential equations (energy equations) supplemented by the adequate boundary and initial conditions. In the final part of the paper, the examples of numerical simulations are shown.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 2; 13-20
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Cattaneo-Vernotte bioheat transfer equation. Stability conditions of numerical algorithm based on the explicit scheme of the finite difference method
Autorzy:: Mochnacki, B.
Tuzikiewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/122475.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
Cattaneo-Vernotte equation
finite difference method
stability conditions of FDM explicit scheme
przepływ biociepła
równanie Cattaneo-Vernotte
metoda różnic skończonych
Opis:: The Cattaneo-Vernotte (CVE) equation is considered. This equation belongs to the group of hyperbolic PDE. Supplementing this equation by two additional terms corresponding to perfusion and metabolic heat sources one can apply the CVE as a mathematical model describing the heat transfer processes proceeding in domain of the soft tissue. Such an approach is recently often preferred substituting the classical Pennes model. At the stage of numerical computations the different numerical methods of the PDE solving can be used. In this paper the problems of stability conditions for the explicit scheme of the finite difference method (FDM) are discussed. The appropriate condition limiting the admissible time step have been found using the von Neumann analysis.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2016, 15, 4; 137-144
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Modelling of thermal damage process in soft tissue subjected to laser irradiation
Autorzy:: Jasiński, M.
Powiązania:: https://bibliotekanauki.pl/articles/122854.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
optical diffusion equation
Arrhenius scheme
Boundary element method
finite difference method
przepływ ciepła
metoda różnic skończonych
metoda elementów brzegowych
równanie dyfuzji
uszkodzenie termiczne
Opis:: The numerical analysis of thermal damage process proceeding in biological tissue during laser irradiation is presented. Heat transfer in the tissue is assumed to be transient and two-dimensional. The internal heat source resulting from the laser irradiation based on the solution of the diffusion equation is taken into account. The tissue is regarded as a homogeneous domain with perfusion coefficient and effective scattering coefficient treated as dependent on tissue injury. At the stage of numerical realization, the boundary element method and the finite difference method have been used. In the final part of the paper the results of computations are shown.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 2; 29-41
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Mathematical modeling of the phenomena that occur in a biological tissue containing photosensitizer
Autorzy:: Jasiński, Marek
Zadoń, Maria
Powiązania:: https://bibliotekanauki.pl/articles/2202041.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: bioheat transfer
optical diffusion equation
photodynamic therapy
boundary element method
finite difference method
przepływ ciepła
równanie dyfuzji optycznej
terapia fotodynamiczna
metoda elementów brzegowych
metoda różnic skończonych
Opis:: The aim of the study is to analyze photothermal and photochemical phenomena that occur during photodynamic therapy (PDT). In this type of therapy, under the influence of the laser, reactions take place related to the transformation of triplet oxygen form into its singlet form which is cytotoxic to the tissue. The increases in temperature resulting from the laser-tissue interaction during PDT are not big; however, they can lead to changes in tissue perfusion, which can affect oxygen delivery to the tissue. The proposed model uses optical diffusion equation, Pennes bioheat transfer equation, and reactions equations for PDT. The main findings of the analysis show the impact of temperature on the value of the perfusion coefficient and triplet oxygen distributions at the end of the treatment procedure.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 4; 40--51
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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