Manual Principles of Heat Transfer in Porous Media

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To learn more about Copies Direct watch this short online video. Need help? How do I find a book? Can I borrow this item? Can I get a copy? Can I view this online? Sat 28 Sep closed Sun 29 Sep closed More opening hours. Description: XX, p. New York N. APA: Kaviany, M. Principles of heat transfer in porous media. K29 a 80 2 msc 1 a Kaviany, Massoud 1 a Principles of heat transfer in porous media.

Set language NL EN. Contact Live chat offline E-mail: libservice ugent. The tortuosity of the solid skeleton was included by considering two outermost cases: inline and staggered configurations, as described in Figure 3. Figure 3. Experimental Methods Although several bench-scale tests were performed, this section introduces two independent experiments that are directly associated with the examination of heat transfer in porous media: 1.

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The exact quantity of irradiance on the exposed surfaces of a specimen placed in CC was thoroughly scrutinised in a previous study [ 38 ]. Unlike EF, CC simultaneously enables the real-time observation of both volume expansions and temperature increases. These favourable features contributed to the evaluation of the thermal insulation performance of the inorganic intumescent coating as well as to the verification of the numerical predictions. Electric Furnace Test 3. Figure 4. Figure 5. Table 1 Percentage probability distributions of cell volume. Figure 6. Table 2 Experimental data of fully expanded thickness units of mm [ 14 ].

Methodology 4. Figure 7.

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Heat transfer mechanism through the porous specimen in cone calorimeter testing. Scheme of Determination of Effective Thermal Conductivity 4. Figure 8. Figure 9. Numerical Simulations and Results 5. Modelling Scheme The combined conduction-radiation through the porous medium, composed of the structured solid skeleton and clonal RECs, was numerically simulated. Two types of FEA models are proposed for different purposes: Figure 10 a,b demonstrate the geometry and thermal boundaries of the two types of models: 1.

This was developed to determine the size of the RECs associated with the findings of the topological analysis and to evaluate the thermal insulation performance of the inorganic intumescent system.

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We completed this assessment by defining a range of effective thermal conductivity k eff that was applicable to the porous coating-residue. Figure Table 4 Thermo-physical properties of the materials and convective coefficients in cone calorimeter testing. Prototype Model 5. Derivation of Void Radiation In order to simulate the radiation transfer through the voids of the inorganic intumescent coating, we formulated a radiation-exchange mechanism in a unit enclosure using the extended net-radiation method [ 41 ].

Multicellular-Type Model After the sub-study using the prototype model, we conducted a series of primary FEA simulations adopting the multicellular-type model. Table 5 Geometric variables used in the supplementary FEA simulations.

Heat and Mass Transfer with Condensation in Capillary Porous Bodies

Table 8 Geometric variables for multicellular modelling. Verification Figure 14 illustrates the concept of the model composed of thin layers i. Conclusions The main purpose of this work was to define the range of effective thermal conductivity k eff applicable to the particular form of porous medium inorganic intumescent coating to quantitatively assess its thermal insulation performance. Author Contributions Conceptualization, J. Conflicts of Interest The authors declare no conflict of interest. References 1. Dowling J. Bourbigot S. Fire Retardancy of Polymeric Materials.

Intumescence-based fire retardants Chapter 6.

Bulewicz E. Intumescent silicate-based materials: Mechanism of swelling in contact with fire. Fire Mater. Intumescent silicates: Synthesis, characterisation and fire protective effect; pp. Choi J. Temperature on structural steelworks insulated by inorganic intumescent coating.

Steel Compos. Kang S. Coupled thermo-physical behaviour of an inorganic intumescent system in cone calorimeter testing. Fire Sci. Gibson L. Cellular Solids: Structure and Properties. Thermal, electrical and acoustic properties of foams; pp. Skochdopole R. The thermal conductivity of foamed plastics. Absorptivity and its dependence on heat source temperature degree of thermal breakdown. Kim D. Effect of wall conduction and radiation on natural convection in a rectangular cavity.

Heat Transf. Misra D. Finite element analysis of conjugate natural convection in a square enclosure with a conducting vertical wall. Methods Appl. Russell H. Principles of heat flow in porous insulators. Bakker K. Using the finite element method to compute the influence of complex porosity and inclusion structures on the thermal and electrical conductivity. Heat Mass Transf. Carson J. An analysis of the influence of material structure on the effective thermal conductivity of theoretical porous materials using finite element simulations.

Druma A. Analysis of thermal conduction in carbon foams. Thermal conductivity bounds for isotropic, porous materials. Coquard R. Numerical investigation of conductive heat transfer in high-porosity foams. Acta Mater. Mendes M. A simple and efficient method for the evaluation of effective thermal conductivity of open-cell foam-like structure.

Course - Heat and Mass Transfer in Porous Media - EP - NTNU

Placido E. Thermal properties predictive model for insulating foams. Intrared Phys. Zhao C. Analytical considerations of thermal radiation in cellular metal foams with open cells.

Principles of Heat Transfer in Porous Media Mechanical Engineering Series

Radiative properties of expanded polystyrene foams. ASME J. Homogeneous phase and multi-phase approaches for modelling radiative transfer in foams.