Dissertation/ Thesis
Προβολή σε EDS

Numerical resolution of mass, momentum, and energy equations in 3D steady-state and transient models; Application to next generation of HVAC&R components and equipment

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Numerical resolution of mass, momentum, and energy equations in 3D steady-state and transient models; Application to next generation of HVAC&R components and equipment
Συγγραφείς: Šehović, Sara-Medina
Συνεισφορές: Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics, Rigola Serrano, Joaquim, Trias Miquel, Francesc Xavier, Oliva Llena, Asensio
Στοιχεία εκδότη: Universitat Politècnica de Catalunya
Έτος έκδοσης: 2025
Συλλογή: Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge
Θεματικοί όροι: Àrees temàtiques de la UPC::Energies, Àrees temàtiques de la UPC::Enginyeria mecànica, Fluid dynamics -- Data processing, Navier-Stokes equations, Numerical analysis, Dinàmica de fluids computacional, Equacions de Navier-Stokes, Anàlisi numèrica
Περιγραφή: The rising global demand for energy, particularly in the context of heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems, necessitates the development of more efficient and environmentally sustainable solutions. This thesis focuses on the numerical resolution of the mass, momentum, and energy Navier-Stokes equations, using both steady-state and transient computational models. The work presents a comprehensive review of turbulence theory and modeling, including Direct Numerical Simulation (DNS), Large-Eddy Simulation (LES), and Reynolds-Averaged Navier-Stokes (RANS) approaches. The main emphasis is placed on the development, implementation, and validation of robust numerical algorithms using the Finite Volume Method (FVM), staggered meshing, and different temporal and spatial discretization schemes. The simulations were performed using the C++ programming language. Benchmark cases, such as 2D transient heat conduction, the SmithHutton problem, the Lid-driven cavity, and Differentially heated cavity flows, are simulated and analyzed to assess the impact of various numerical solution factors on solution accuracy, stability, and computational performance. Particular attention was given to the comparison of different convective schemes, with a main focus on the Central Difference (CDS), Upwind Difference (UDS), Second-Order Upwind Linear Extrapolation (SUDS), and Quadratic Upwind Interpolation for Convective Kinematics (QUICK) convective schemes, as well as the mesh convergence studies. Furthermore, the numerical results were verified by comparing them to benchmark solutions. Additionally, energy budgets were discussed, with the analysis of the convective schemes impact. The findings advance the understanding of CFD methodologies applied to HVAC&R systems, providing a basis for future research aimed at optimizing the design of next-generation thermal components and equipment, with the goal of reaching a solution to the ever-growing environmental issues caused by the excessive energy ...
Τύπος εγγράφου: master thesis
Περιγραφή αρχείου: application/pdf
Γλώσσα: English
Relation: https://hdl.handle.net/2117/446385
Διαθεσιμότητα: https://hdl.handle.net/2117/446385
Rights: Open Access
Αριθμός Καταχώρησης: edsbas.A3CDF834
Βάση Δεδομένων: BASE
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  – Url: https://hdl.handle.net/2117/446385#
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PubType: Dissertation/ Thesis
PubTypeId: dissertation
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  Data: Numerical resolution of mass, momentum, and energy equations in 3D steady-state and transient models; Application to next generation of HVAC&R components and equipment
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  Data: <searchLink fieldCode="AR" term="%22Šehović%2C+Sara-Medina%22">Šehović, Sara-Medina</searchLink>
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  Data: Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics<br />Rigola Serrano, Joaquim<br />Trias Miquel, Francesc Xavier<br />Oliva Llena, Asensio
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  Data: Universitat Politècnica de Catalunya
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  Data: 2025
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  Data: Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge
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  Data: <searchLink fieldCode="DE" term="%22Àrees+temàtiques+de+la+UPC%3A%3AEnergies%22">Àrees temàtiques de la UPC::Energies</searchLink><br /><searchLink fieldCode="DE" term="%22Àrees+temàtiques+de+la+UPC%3A%3AEnginyeria+mecànica%22">Àrees temàtiques de la UPC::Enginyeria mecànica</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics+--+Data+processing%22">Fluid dynamics -- Data processing</searchLink><br /><searchLink fieldCode="DE" term="%22Navier-Stokes+equations%22">Navier-Stokes equations</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Dinàmica+de+fluids+computacional%22">Dinàmica de fluids computacional</searchLink><br /><searchLink fieldCode="DE" term="%22Equacions+de+Navier-Stokes%22">Equacions de Navier-Stokes</searchLink><br /><searchLink fieldCode="DE" term="%22Anàlisi+numèrica%22">Anàlisi numèrica</searchLink>
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  Data: The rising global demand for energy, particularly in the context of heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems, necessitates the development of more efficient and environmentally sustainable solutions. This thesis focuses on the numerical resolution of the mass, momentum, and energy Navier-Stokes equations, using both steady-state and transient computational models. The work presents a comprehensive review of turbulence theory and modeling, including Direct Numerical Simulation (DNS), Large-Eddy Simulation (LES), and Reynolds-Averaged Navier-Stokes (RANS) approaches. The main emphasis is placed on the development, implementation, and validation of robust numerical algorithms using the Finite Volume Method (FVM), staggered meshing, and different temporal and spatial discretization schemes. The simulations were performed using the C++ programming language. Benchmark cases, such as 2D transient heat conduction, the SmithHutton problem, the Lid-driven cavity, and Differentially heated cavity flows, are simulated and analyzed to assess the impact of various numerical solution factors on solution accuracy, stability, and computational performance. Particular attention was given to the comparison of different convective schemes, with a main focus on the Central Difference (CDS), Upwind Difference (UDS), Second-Order Upwind Linear Extrapolation (SUDS), and Quadratic Upwind Interpolation for Convective Kinematics (QUICK) convective schemes, as well as the mesh convergence studies. Furthermore, the numerical results were verified by comparing them to benchmark solutions. Additionally, energy budgets were discussed, with the analysis of the convective schemes impact. The findings advance the understanding of CFD methodologies applied to HVAC&R systems, providing a basis for future research aimed at optimizing the design of next-generation thermal components and equipment, with the goal of reaching a solution to the ever-growing environmental issues caused by the excessive energy ...
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    Languages:
      – Text: English
    Subjects:
      – SubjectFull: Àrees temàtiques de la UPC::Energies
        Type: general
      – SubjectFull: Àrees temàtiques de la UPC::Enginyeria mecànica
        Type: general
      – SubjectFull: Fluid dynamics -- Data processing
        Type: general
      – SubjectFull: Navier-Stokes equations
        Type: general
      – SubjectFull: Numerical analysis
        Type: general
      – SubjectFull: Dinàmica de fluids computacional
        Type: general
      – SubjectFull: Equacions de Navier-Stokes
        Type: general
      – SubjectFull: Anàlisi numèrica
        Type: general
    Titles:
      – TitleFull: Numerical resolution of mass, momentum, and energy equations in 3D steady-state and transient models; Application to next generation of HVAC&R components and equipment
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              Y: 2025
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