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Virtual Modeling of Thermo-Physiological Comfort in Clothing

P. Van Ransbeeck [1], R. Benoot [1], B. Van Der Smissen [1]
[1] University College Ghent, Faculty of Science and Nature, Department of Mechatronics, Belgium

This publication aims to investigate conjugate heat and mass transfer around a clothed virtual manikin. This research can be performed at different scales: (1) at material scale where a piece of textile is investigated in 1D or 2D space or (2) at system level where a clothed cylindrical body (2D) or a complete manikin (3D) is modeled. The work is based on previous methods and results from ...

Analysis of Coupled Dynamics of Molten Salt Reactors

V. Di Marcello, A. Cammi, and L. Luzzi
Department of Energy, Nuclear Engineering Division (CeSNEF), Politecnico di Milano, Milano, Italy

This paper presents a preliminary analysis of the coupled thermo-hydrodynamics and neutronics of circulating nuclear fuel systems in a nuclear reactor that adopts a molten salt mixture. This flows up through channels in a graphite moderated core and plays the role of both heat generator and coolant. A strongly coupled system is needed since the velocity pattern is affected by the neutron ...

Heat Pipe Assisted Thermal Management of an HT PEMFC Stack

E. Firat[1], G. Bandlamudi[1], M. Crisogianni[1], P. Beckhaus[1], A. Heinzel[1]
[1]Centre for Fuel Cell Technology (ZBT), Duisburg,NRW, Germany

Heat management is crucial for the satisfactory operation of HT-PEM (High temperature polymer-electrolyte-membrane) fuel cells. Current work investigates the use of heat pipes in a HT PEMFC stack consisting of 24 cells, each with an active area of 300 cm^2. Heat pipes are known to be thermal superconductors operating on the principles of high convective heat transfer and phase transition. ...

Turbulent Compressible Flow in a Slender Tube

K.O. Lund[1], C.M. Lord[2]
[1]Kurt Lund Consulting, Del Mar, CA, USA
[2]Lord Engineering Corp., Encinitas, CA, USA

Pressure-drop experiments were conducted for the turbulent, compressible flow of air in a small, slender tube, and modeled with COMSOL heat transfer module, and analytically. A scalar integration variable is introduced which integrates the mass velocity [kg/m²s] over the inlet area and iteratively equates this to the input mass flow [kg/s]. For computation, the temperature specification is ...

Multiphysics and Simulation of MEMS based Bolometer for Detecting the Radiations in Nuclear Power Plants

K. Umapathi[1], S. Swetha[2], K. Ranjitha[2], K. Vinodh[2], K. Deebiga[1], R. Harisudarsan[1]
[1]United Institute of Technology, Coimbatore, TamilNadu, India
[2]Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu, India

High performance micro sensors are important to detecting special nuclear materials radiations in different fields to save the globe. This paper is mainly focused on to develop a MEMS based bolometer for detecting the nuclear radiation to provide the high security in Nuclear power Plants. A thermally sensitive micro metal plate is designed and placed on a substrate through micro thermal link. ...

Several Benchmarks for Heat Transfer Problems in COMSOL Multiphysics®

S. Titarenko[1]
[1]University of Leeds, Leeds, United Kingdom

Nowadays all branches in modern science and industry tend to solve ever complicating problems. As the result the computational time increases considerably and it become very important to reduce the processing time and use available resources more efficiently. Parallelizing problem proves itself as efficient way to overcome the described problem. In the poster we compare different methods of ...

Study of the Process, Design, and Operating Parameters Effect on the Efficiency of the Process Mill - new

A. K. Farouk[1]
[1]Department of Mathematics & Natural Science, University of Stavanger, Sandnes, Rogaland, Norway

This study is to investigate the velocity pattern and the velocity magnitude of the cuttings that is being processed in the process mill as a result of the rotating hammers. The process mill consists of a horizontal cylindrical shell equipped with renewable liners and rotating hammers for milling of drill cuttings. An F.E model of the process mill was constructed using dimensions similar to ...

Thermal Simulation of FCBGA Package with Heat Sink

M. R. Naik[1]
[1]Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka, India

In a modern IC design, the capability of predicting the temperature profile is critically important as well as cooling and related thermal problems are the principal challenges. To address these challenges, thermal analysis must be embedded within IC synthesis. This paper presents thermal analysis of the FCBGA chip with a 4mm×4mm×0.3mm silicon die. The silicon die dissipates heat flux of ...

Simulation and Verification of Coupled Heat and Moisture Modelling

N. Williams Portal[1], M. van Aarle[2], and J. van Schijndel[2]
[1]Department of Civil and Environmental Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
[2]Department of Architecture, Building and Planning, Technical University of Eindhoven, Eindhoven, The Netherlands

This paper includes the implementation and comparison of two types of moisture potentials for the combined transport: the natural logarithmic of the suction pressure (LPc) and the relative humidity (RH). The finite element method has been utilized to evaluate coupled 1D thermal and hygric transport by means of COMSOL Multiphysics. The combined transport mechanisms were described by the ...

Use of COMSOL as a Tool in the Design of an Inclined Multiple Borehole Heat Exchanger

E. Johansson[1], J. Acuña[1], B. Palm[1]
[1]Royal Institute of Technology KTH, Stockholm, Sweden

A field of connected boreholes can be used both for cooling, heating and storage purposes. The boreholes transfer heat to or from the ground, which over time changes the temperature in the ground. It is important that the borehole field is properly sized and evaluated before the construction. This study presents results from borehole field evaluations of inclined boreholes used for cooling ...