Tomasz Strzelecki

Tomasz Strzelecki
Wroclaw University of Science and Technology | WUT · Faculty of Technology and Sciences

Professor

About

85
Publications
7,765
Reads
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202
Citations
Introduction
Tomasz Strzelecki currently works at the Faculty of Technology and Sciences, Wroclaw University of Science and Technology. Their current project is 'Thermal consolidation of a two-phase medium , considering gas as a pore fluid'.
Additional affiliations
September 2015 - November 2017
Wroclaw University of Science and Technology
Position
  • Managing Director
January 1968 - January 2015
Wroclaw University of Science and Technology
Position
  • Professor (Full),Researcher Director, Laboratory Head

Publications

Publications (85)
Article
Full-text available
The purpose of this paper was to present the thermoporoelasticity model adapted for application in modelling processes, where phase transition may occur, such as during underground coal gasification (UCG). The mathematical model of the medium (soil/rock with pores filled with liquid/gas) in non-isothermal conditions is based on Biot's poroelasticit...
Chapter
Full-text available
W pracy przedstawiono rozwiązywanie zagadnień teorii filtracji metodami analitycznymi w tym zagadnień płaskich z wykorzystaniem przekształceń konforemnych
Chapter
Full-text available
Jednym z zadań jakie postawili sobie autorzy niniejszej monografii jest prześledzenie metod modelowania przepływu wód podziemnych w zakresie strefy saturacji z uwzględnieniem przepływów odbywających się w strefie aeracji. Przedstawione w tej pracy sposoby modelowania procesów przepływu mają na celu przedstawienie metod rozwiązywania praktycznych za...
Chapter
Full-text available
1. Podstawowe pojęcia z zakresu mechaniki ośrodków porowatych 1.1. Modelowanie procesów w geoinżynierii Musimy na wstępie odpowiedzieć sobie na pytanie, czym zajmuje się mechanika ośrodków porowatych i jaki jest zakres zagadnień, którymi się zajmuje. Jest ona czasem określana jako dział geotechniki ze względu na liczbę zastosowań doty-czących mecha...
Chapter
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Rozdział zawiera opis analizy numerycznej procesu osiadań budowli Afrykarium zbudowanego we wrocławskim ZOO
Chapter
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Podstawowe równania teorii przepływu cieczy i gazów przez ośrodek porowaty zawierające: -proces homogenizacji filtracji metodą zbieżności dwuskalowej -model matematyczny filtracji zgodny z teorią Biota -układ równań hydrodynamiki wód podziemnych w zagadnieniach 2D -potencjał sił masowych filtracji -teorię przepływu elektrokinetycznego
Chapter
Full-text available
Modele matematyczne stanu granicznego W większości zagadnień związanych z powstaniem w ośrodkach porowatych, w tym w gruncie lub skale, granicznego stanu równowagi uwzględnienie rzeczywistej zależności naprężenie-odkształcenie przed wystąpieniem stanu granicznego jest pod względem matematycznym skomplikowane. W mechanice gruntów stan graniczny wyst...
Book
Full-text available
Książka dotyczy zagadnień mechaniki ośrodków porowatych w zakresie: - przepływu płynów przez ośrodki porowate -zagadnień termo-filtracji cieczy i gazów -konsolidacji i termo-konsolidacji ośrodków porowatych -wyznaczania parametrów modeli reologicznych -teorie ciał porowatych lepko-sprężystych lepko-plastycznych
Article
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In the study described here model calibration was performed employing the inverse analysis using genetic algorithms (GA). The objective of analysis is to determine value of the coefficient of hydraulic conductivity, k . The commonly used method for the determination of coefficient of hydraulic conductivity based on Terzaghi consolidation leads to a...
Article
Full-text available
This article presents the results of numerical simulations of seepage through the body of the dam and the reservoir bed. The purpose of this study was to analyse the seepage stability during a flood as well as the impact on seepage stability of the diaphragm wall and gravel columns, on which the dam body is founded in selected segments. Simulations...
Article
Full-text available
In the case of a two-phase medium-such as the soil, which consists of an elastic skeleton and is filled with pore fluids-stress and strain within the medium are dependent on both phases. Similarly, in the case of heat transfer, heat is conducted through the two phases at different rates, with an additional heat transfer between the phases. In the c...
Article
Full-text available
In this paper, the results of numerical analysis of the thermal consolidation of a two phase medium, under the assumption of independent heat transfer in fluid and the solid phase of the medium, are presented. Three cases of pore fluid were considered: liquid, represented by water, and gas, represented by air and carbon dioxide. The mathematical mo...
Article
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The following study presents numerical calculations for establishing the impact of temperature changes on the process of distortion of bi-phase medium represented using Biot consolidation equations with Kelvin–Voigt rheological skeleton presented, on the example of thermo-consolidation of a pavement of expressway S17. We analyzed the behavior of th...
Article
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This article presents the results of numerical calculations of soil consolidation underneath the “Africa Pavilion” structure in Wrocław Zoo, Poland. To determine the deformations of the baseplate of the “Africa Pavilion” and deformations of the subsoil, Biot’s consolidation theory for two-phase medium was applied. The calculations were carried out...
Article
Full-text available
The paper presents results of numerical computations of the filtration flow of liquid contaminated wastes through the Żelazny Most flotation tailings disposal lake. Unlike the preceding papers [5]–[7], it takes the geological structure of the subsoil into account. A three-dimensional numerical model of the lake was created for computing purposes. D...
Article
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This paper presents a different, than commonly used, form of equations describing the filtration of a viscous compressible fluid through a porous medium in isothermal conditions. This mathematical model is compared with the liquid flow equations used in the theory of consolidation. It is shown that the current commonly used filtration model represe...
Article
Full-text available
The following study presents numerical calculations for establishing an impact of temperature changes on the process of distortion of bi–phase medium. The Biot consolidation equations with Kelvin–Voigt rheological skeleton were used for that purpose. The process was exemplified by thermal consolidation of post floatation dump “–elazny Most”. We ana...
Article
Full-text available
This paper presents results of laboratory tests aiming in estimation of the effective parameters of the Biot model with the rheological skeleton for the samples collected at the flotation waste landfill “Żelazny Most”. In order to determine the effective parameters series of tests were performed in the laboratory of the Faculty of Civil Engineering...
Article
Full-text available
In the process of coal gasification, the phase transition from water to water vapour takes place as a result of high temperature. Thus, the parameters of the fluid flowing through the pores of the elastic skeleton change in a significant way. The goal of this work is to calculate the fluid flow process at a variable temperature using Finite Element...
Poster
Full-text available
Some of modern technologies of natural resources exploitation may induce groundwater flow by generating high pressure and temperature in the exploitation area. Coal gasification can be considered an example of this kind of methods, where chemical reactions are carried out under high temperature conditions. These conditions are enough to change the...
Conference Paper
In this paper various approaches to a modeling medium consisting of an elastic skeleton with gas-filled pores are presented. Classic equations of the poroelasticity model by Biot are cited, with the modifications considering the presence of not only liquid, but also gas in the pores of the medium. Apart from the isothermal models, models including...
Article
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This article presents the results of numerical calculations of drainage of a large engineering construction - ?Afrykarium? in Wroc?aw ZOO, Poland, based on a 2D numerical model for seepage flow. In the numerical simulations the real (natural) hydrogeological conditions, water-courses, surface reservoirs and time dependent seepage flow (during drain...
Article
Full-text available
This study presents the results of calculations of the of thermo consolidation process of porous medium with the rheological Kelvin-Voigt skeleton, obtained numerically with the use of Flex.PDE. It is a continuation of the discussion on the phenomenon of thermal consolidation. A 3D problem considered boils down to solving the problem of the porous...
Article
Full-text available
This study presents calculations results of thermal consolidation process of the porous medium with the rheological Kelvin-Voigt skeleton, obtained numerically with the use of Flex.PDE software. The investigated calculation scheme consisted of the porous column filled with a liquid. The vertical load was applied to the top surface of the column thr...
Article
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With a view to protecting areas lying near the Nysa Kłodzka river and in order to reduce flood wave in Wrocław Waterway System, construction of a water reservoir near Kamieniec Ząbko-wicki is being planned. After analysing the hydrology and hydraulics of the river Nysa Kłodzka and the function of reservoirs in Kamieniec Ząbkowicki cascade, a numeri...
Article
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This paper presents simulation results of the consolidation process of the flotation waste landfill “Zelazny Most”. The mathematical model used in presented research is based on Biot’s model of consolidation and is extended with rheological skeleton. The load is the mass pressure of the landfill itself. The initial point selected for calculations w...
Article
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Taking thermodynamics of irreversible processes as the starting point, the constitutive compounds of the Biot-Darcy consolidation model were derived, provided that the porous medium's skeleton is the Kelvin-Voight viscoelastic body. The physical compounds obtained make it possible to formulate the equations of Biot's consolidation process within a...
Article
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The two-dimensional problem of the consolidation of an earth dam–subsoil system under body forces is presented. A certain loading scenario of the action (in proper time instants) of the sub-soil's, the dam's and, subsequently, the reservoir water's deadweight and the seepage flow of ground-water arising thereof was assumed. Calculations for the Bio...
Article
Full-text available
In this paper, the analytical solution of porous medium consolidation with the rheological Kelvin-Voigt frame is presented. The rheological model is a model which elements are four basic physical features: elasticity, viscosity, plasticity and strength. One-dimensional problem insist on solving equations for porous column filed with liquid and bein...
Article
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In this work, we present the problem of the creeping of the porous medium described by linear and nonlinear poroelasticity models based on physical relation in the Biot's body. The porosity function which depends on a dilatation of skeleton and fluid is introduced into the nonlinear model, and a process of medium deformation is also presented. The...
Article
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In this work we present the creep problem of the porous medium described by a linear and nonlinear poroelasticity models based on physical relation of the Biot’s body. The porosity function which depends on a dilatation of skeleton and fluid is introduced into the nonlinear model, and a process of medium deformation is also presented. The filtratio...
Article
The paper presents major aspects of the currently developed object-oriented Spatial Information System for the Municipality of Wroclaw. Presented tasks make up one of the stages of the project realised within the framework of the KBN grant. The article describes the project's main assumptions, objectoriented structure of the system central reposito...
Article
Relationship between settling of geodetic marking points (repers) and geological and hydrotechnical structure of surrounding area has been discussed in the paper.
Article
Full-text available
A fractured porous medium is a double-porosity medium, i.e. it consists of two interacting porous systems whose permeabilities are very different. One of the two porous structures is associated with the fractures and the other one with the porous matrix. Thus, when looking for a macroscopic equivalent...
Article
Full-text available
A set of equations governing the consolidation of a two-phase medium consisting of a porous elastic skeleton saturated with a highly compressible liquid (gas), is described. The homogenization method was utilized to deduce the equations. For the equivalent macroscopic medium, mass and momentum conservation equations and the flow equation of pore li...
Article
Full-text available
The flow of very compressible fluids through deformable porous media is investigated using the homogenization process for periodic structures. This technique allows formulation of the macroscopic description from that of the pore level. It allows us to refine the physics involved and shows the limits within which such macroscopic modelling is possi...
Article
Electro-osmosis in a saturated porous rigid medium is studied by both theoretical and experimental approach. Relationships giving liquid and electrical coupled macroscopic flows are obtained from the homogeneization method. They point out possible non symmetrical cross effects that explain deviations from Onsager reciprocal relations. Experiments o...

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