Abstract:The palm fibre reinforced polyester composites (PFRP)

In the present investigation the thermal conductivity of composites of epoxy reinforced with pine wood dust (PWD) at different volume fractions are determined experimentally by using Lee's apparatus. The composites have been prepared by using hand-lay-up technique. The principle of heat transfer by conduction through a bad conductor is equal to the quantity of heat transfer by radiation from the metallic disc has been applied. The experimental results show that the incorporation of pine wood dust results in reduction of thermal conductivity of epoxy resin and there by improves its thermal insulation capability. Experimental results are compared with Rule of mixture model, Maxwell model, Russell model and Wood side & Baschirow & Selenew to describe the variation of thermal conductivity versus the volume fraction of the fibre. All these models exhibited results close to each other at low dust content. It has been found that the errors associated with these models with respect to experimental ones lie in the range of 0.

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In this present work, a computational code is developed to solve a laminar two-dimensional lid driven cavity flow with inclined side wall. SIMPLE (Semi-Implicit Method for Pressure-Linked Equation) algorithm based on finite volume method on staggered grid has been used. Differed QUICK (Quadratic Upstream Interpolation for Convective Kinematics) schemes have been implemented for all calculations. The results are presented for inclination angle β = 30˚, 45˚ and Re = 100, 1000 and are compared with Demirdzic et al. benchmark solution. By comparison, it is found that the results are in very good agreement with the benchmark solution for Re = 100. But the results are close to the benchmark solution for Re = 1000.

In the present work, an experimental approach was used to find out the thermal conductivity of rice husk filled polymer composites using guarded heat flow meter method in accordance with ASTME-1530 standard. The result shows that the incorporation of rice husk reduces the thermal conductivity of polymer resin and improves its insulation capability. At last, an attempt has been made to optimize the thermal properties of rice husk reinforced polymer composites (RHPC) materials using Taguchi technique. In this work, the ANOM results showed that the combination of rice husk particle size of 250 µm with volume fraction of filler material (45%) with vinyl ester as the matrix material was beneficial for minimizing the thermal properties of rice husk particles reinforced polymer composites and the degree of contribution of the parameters to the system were volume fraction > particle size > polymer resin. From ANOVA results, it was found out that the % of filler material has major influence (79.588%) on minimizing thermal conductivity and the particle size has less effect (1.126). Finally, the results revealed that using rice husk particles as reinforcement for polymer matrix could successfully develop beneficial composites and can be used for thermal applications.

In the present study, computational details of two parallel plane jets with nozzle separation ratio = 4.25 and Re = 11,000 are presented. A study of the turbulence has also been done. The computational domain size, grid resolution, and different discretization schemes on the predictions are discussed. The existence of a recirculation flow region, a merging region and a combined region in the two parallel plane jets configuration has been predicted qualitatively by κ ε − model. Power law scheme is used for discretizing the convective terms. Calculations were made using a Power law scheme. A code is used to solve a laminar, two dimensional viscous fluid flow and heat transfer. At the last it is shown that this code is ready to use for modification for mean flow solution of the turbulent two parallel plane jets. The numerical results are compared with the experimental results. Computational details of various mean flow and turbulent parameters are presented and described with separation ratio of 4.25 and Re = 11,000. The results are compared with Nasr and Lai and are found to be in good agreement with it. The two parallel plane jets develop like a single free jet in the combined region. The outer shear layer spreads faster than the inner shear layer in the near field. Subject AreasMechanical Engineering

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