Browsing by Subject "Heat--Transmission"
Now showing items 21-40 of 55
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Experimental study of heat transport in fractured network
(2015-07-01)
Article
Open AccessFractured rocks play an important role in transport of natural resources through subsurface systems. In recent years, interest has grown in investigating heat transport by means of tracer tests, driven by the important ... -
Far-field radiative thermal rectification based on asymmetric emissivity
(American Chemical Society (ACS), 2023-09-29)
Article
Open AccessThis experimental study investigates thermal rectification via asymmetric far-field thermal radiation on a fused silica slab. An asymmetrical distribution of surface emissivity is created over the device by partially ... -
Film melting heat transfer from a horizontal open surface
(2019-05-26)
Research report
Open AccessIn this internal report, consideration is given to the velocity of melting from a horizontal open surface and with particular reference to polar caps and large glaciers. In current models, the melting velocity is critically ... -
Flow analysis in the HCLL-TBM ITER channels including MHD and heat transfer
(2010)
Conference lecture
Open AccessOne of the key components regarding heat transfer and tritium inventories in deuterium-tritium nuclear fusion reactors is the (tritium) Breeding Blanket, called Test Blanket Module or TBM in ITER experiment. Several ... -
From pure conduction to homogeneous isotropic turbulence
(Universitat Politècnica de Catalunya, 2019-01)
Master thesis
Open AccessL’objectiu d’aquest treball és estudiar multiples casos relacionats amb la dinàmica de fluids i amb la transferència de calor. Més concretament, sis casos de complexitat creixent han estat abordats des de la perspectiva de ... -
Heat and moisture insulation by means of air curtains: application to refrigerated chambers
(Elsevier, 2016-08)
Article
Open AccessThe present study is devoted to the determination of the efficiency of air curtain units (ACUs) applied to heat and moisture insulation of refrigerated chambers. A detailed study of the fluid dynamics and heat and mass ... -
Heat transfer at the nanoscale : The hyperbolic heat equation
(Universitat Politècnica de Catalunya, 2015-07)
Bachelor thesis
Open AccessThe interest of taking technology to increasingly small scales has required great changes and advances in science. In particular, the well-known Fourier's law (very useful in large scales) has proved to be not accurate ... -
Heat transfer enhancement in air by means of acoustic fields
(Universitat Politècnica de Catalunya, 2022-07-07)
Master thesis
Open AccessConvection is the most important heat transfer mechanism in air, and every heat source cools down thanks to it. However, this phenomenon relies on buoyancy and this does not exist in microgravity conditions. For this reason, ... -
Heat Transfer Modeling in Server Refrigeration: A 0D-1D Transient Box
(Purdue University, 2024)
Conference report
Open AccessA 0D-lD transient and computationally inexpensive model is used to simulate the thermal behavior of a server that is placed in an exterior environment. This model consists of N-interconnected boxes that are modeled with a ... -
Indus3es: test rig calibration and initial operation of an absorption heat transformer
(Universitat Politècnica de Catalunya, 2018-01-28)
Bachelor thesis
Open AccessThe absorption heat transformer is technology known for years, which heats water to high temperature from a heat supply at a medium temperature. This heat supply is usually waste heat coming from a chemical or petrochemical ... -
Modelització estocàstica en temps continu. Aplicació a les dinàmiques de calor d’un edifici
(Universitat Politècnica de Catalunya, 2020-01)
Bachelor thesis
Open AccessEn l actual context d emergència climàtica, és necessari analitzar l eficiència energètica dels edificis, incloent les dinàmiques de calor. A més, també cal determinar quins elements poden modificar la temperatura interna ... -
Numerical and experimental investigation of a vertical LiBr falling film absorber considering wave regimes and in presence of mist flow
(2016-11-01)
Article
Open AccessThe absorber represents the most critical component in absorption systems and one of the key issues. In this component complex heat and mass transfer phenomena during the absorption process takes place simultaneously. For ... -
Numerical and experimental studies to evaluate the conservative factor of the convective heat transfer coefficient applied to the design of components in particle accelerators
(2023)
Conference lecture
Restricted access - publisher's policyThe fluid boundary condition applied to the design of components in particle accelerators is calculated as a global variable through experimental correlations coming from the literature. This variable, defined as the ... -
Numerical simulation of wind flow around a parabolic trough solar collector
(2013-07-01)
Article
Restricted access - publisher's policyThe use of parabolic trough solar technology in solar power plants has been increased in recent years. Such devices are located in open terrain and can be the subject of strong winds. As a result, the stability of these ... -
Numerical study of heat transfer from a synthetic impinging jet with a detailed model of the actuator membrane
(2019-02-02)
Article
Open AccessSynthetic jets are produced by the oscillatory movement of a membrane inside a cavity, causing the fluid to enter and leave through a small orifice. The present study is focused on investigating the cooling capabilities ... -
Oil condition effects over the heat transfer performance in CSP parabolic trough power plants
(Universitat Politècnica de Catalunya / Universitat de Barcelona, 2015-10)
Master thesis
Restricted access - confidentiality agreement -
On the CFD&HT of the flow around a parabolic trough solar collector under real working conditions
(2013)
Conference report
Open AccessParabolic trough solar collector is currently one of the most mature and prominent solar applications for production of electricity. These systems are usually located in open terrain where strong winds may occur and affect ... -
On the role of a centrifugal instability in the vortex-induced vibration of a two-degrees of freedom circular cylinder at moderate Reynolds numbers
(2018)
Conference report
Restricted access - publisher's policyIn this work, the formation and role of a centrifugal instability in the VIV phenomenon at moderate Reynolds numbers are investigated for the ¿rst time. Large eddy simulations of a low mass ratio (m = 2.6) two-degree-of-freedom ... -
Particulate immersed boundary method for complex fluid-particle interaction problems with heat transfer
(2016-01-01)
Article
Open AccessIn our recent work (Zhang et al., 2015), a Particulate Immersed Boundary Method (PIBM) for simulating fluid-particle multiphase flow was proposed and assessed in both two- and three-dimensional applications. In this study, ... -
Phragmén-Lindelöf alternative for an exact heat conduction equation with delay
(2013-05-01)
Article
Restricted access - publisher's policyIn this paper we investigate the spatial behavior of the solutions for a theory for the heat conduction with one delay term. We obtain a Phragm én- Lindelöf type alternative. That is, the solutions either decay in an ...
