Now showing items 1-20 of 30

• #### A level-set model for mass transfer in bubbly flows ﻿

(2019-08-01)
Article
Open Access
A level-set model is presented for simulating mass transfer or heat transfer in two-phase flows. The Navier-Stokes equations and mass transfer (or heat transfer) equation are discretized using a finite volume method on a ...
• #### A one-phase Stefan problem with size-dependent thermal conductivity ﻿

(2018-07-02)
Article
Open Access
In this paper a one-phase Stefan problem with size-dependent thermal conductivity is analysed. Approximate solutions to the problem are found via perturbation and numerical methods, and compared to the Neumann solution for ...
• #### Comparison of drop evaporation models on hot surface ﻿

(Universitat Politècnica de Catalunya / Politecnico di Milano, 2014)
Bachelor thesis
Open Access
Covenantee:   Politecnico di Milano
This project is a study of how a sessile drop evaporates on a hot surface. Some existing models of droplet evaporation are explained, understood, simulated and compared. This project also provides an expression of drop ...
• #### Computational fluid dynamics modeling of impinging gas-jet systems: I. Assessment of eddy viscosity models ﻿

(2005-07-15)
Article
Restricted access - publisher's policy
Computational fluid dynamics plays an important role in engineering design. To gain insight into solving problems involving complex industrial flows, such as impinging gas-jet systems (IJS), an evaluation of several eddy ...
• #### Computational fluid dynamics modeling of impinging gas-jet systems: II. Application to an industrial cooling system device ﻿

(2005-07-15)
Article
Restricted access - publisher's policy
A numerical analysis of the flow behavior in industrial cooling systems based on arrays of impinging jets has been performed, using several eddy viscosity models to determine their modeling capabilities. For the cooling ...
• #### Conductive and convective heat transfer in fluid flows between differentially heated and rotating cylinders ﻿

(2015-11-01)
Article
Open Access
The flow of fluid confined between a heated rotating cylinder and a cooled stationary cylinder is a canonical experiment for the study of heat transfer in engineering. The theoretical treatment of this system is greatly ...
• #### Disseny d'un sistema de recuperació d'aigua per una planta de producció d'hidròxid càlcic ﻿

(Universitat Politècnica de Catalunya, 2008-06)
Master thesis (pre-Bologna period)
Restricted access - author's decision
La conservació del medi i dels recursos naturals és un dels plantejaments que realitzen actualment les indústries per tal de realitzar la seva tasca productiva d'una manera més sostenible. El present projecte té com a ...
• #### La ecuación del calor ﻿

(2014-01-31)
Other
Open Access
La ecuación del calor fue propuesta por Fourier en 1807-en su memoria sobre la propagación del calor en los cuerpos sólidos. En ella proponía además el germen de lo que pasaria a ser la Teoría de las Series de Fourier. Tan ...
• #### Electrochemically-assisted thermal-based technologies for soil remediation ﻿

(2021)
Part of book or chapter of book
Restricted access - publisher's policy
In situ thermal remediation (ISTR) technologies are considered a good option to both, evaporate volatile organic contaminants (VOCs) and enhance the mass transport of dissolved chemicals, avoiding the drawbacks associated ...
• #### Evaluating the freeze–thaw phenomenon in sandwich-structured composites via numerical simulations and infrared thermography ﻿

(Springer, 2020-07-13)
Article
Open Access
The water ingress phenomenon in sandwich-structured composites used in the aerospace/aeronautical sector is a current issue. This type of defect can cause in the course of time several other defects at the boundary, such ...
• #### Experimental assessment of an analytical model of the convective heat transfer coefficient in a mine gallery ﻿

(Springer Nature, 2022-04-07)
Article
Restricted access - publisher's policy
• #### Fachadas disipadoras de calor: recursos para el diseño arquitectonico ﻿

(Universitat Politècnica de Catalunya, 2016-01)
Master thesis
Open Access
Internal heat gains in a building represent a problem when heat dissipation from devices or users, does not have escape routes other than natural ventilation, especially in warm climates. This paper aims to collect data ...
• #### Finite element analysis of the thermal behavior of a RepRap 3D printer liquefier ﻿

(2016-05-01)
Article
Open Access
The aim of this paper is to analyze the performance of a RepRap 3D printer liquefier by studying its thermal behavior, focusing on the convective heat dissipation developed along the liquefier body during the 3D printing ...
• #### Flow and heat transfer of impinging synthetic jets ﻿

(Universitat Politècnica de Catalunya, 2019-06-19)
Doctoral thesis
Open Access
Synthetic jets are produced by the oscillatory movement of a membrane inside a cavity, causing fluid to enter and leave through a small orifice. This results in a net jet that is able to transfer kinetic energy and momentum ...
• #### Fluid dynamics and heat transfer in the wake of a sphere ﻿

(2019-04)
Article
Open Access
Direct numerical simulation and large-eddy simulation have been performed for a heated sphere at Reynolds numbers of $Re=1000$ and $Re=10^4$, respectively. The Prandtl number for both simulations has been $Pr=0.7$. ...
• #### Heat loss prediction of a confined premixed jet flame using a conjugate heat transfer approach ﻿

(Elsevier, 2017-04)
Article
Open Access
The presented work addresses the investigation of the heat loss of a confined turbulent jet flame in a lab-scale combustor using a conjugate-heat transfer approach and large-eddy simulation. The analysis includes the ...
• #### Heat Transfer Effects on a Fully Premixed Methane Impinging Flame ﻿

(Springer, 2016-01-09)
Article
Open Access
A numerical assessment of different thermal conditions for an impinging flame configuration is investigated using large-eddy simulation. The cases of study correspond to a turbulent methane flame at equivalence ratio ER = ...
• #### Heat transfer enhancement in air by means of acoustic fields ﻿

(Universitat Politècnica de Catalunya, 2022-07-07)
Master thesis
Open Access
Convection 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, ...
• #### La Ecuación del calor ﻿

(2003-09-22)
Audiovisual
Open Access
Lliçó inaugural del curs 2003-2004 a càrrec del Dr. Caffarelli, professor de la Universitat de Texas.
• #### Liquid metal MHD flow influence on heat transfer phenomena in fusion reactor blankets ﻿

(2021-09-01)
Article
Restricted access - publisher's policy
DEMO reactor is projected as a technological demonstrator and a component test reactor for several key systems such as the breeding blanket. The dual coolant lithium lead (DCLL) is one promising breeding blanket candidate ...