CFD simulation for evaluation of optimum heat transfer rate in a heat exchanger of an internal combustion engine

Abstract

Heat exchanger is an essential component of an engine cooling system. Radiators are compact heat exchangers used to transfer the heat absorbed from engine to the cooling media. The jacket cooling water gets cooled and re-circulated into system after exchanging the heat with cooling water in a heat exchanger. Conventional fluids like water, oil, ethylene glycol, etc. possess less heat transfer performance; therefore, it is essential to have a compact and effective heat transfer system to obtain the required heat transfer. A reduction in energy consumption is possible by improving the performance of heat exchanging systems and incorporating various heat transfer enhancement techniques. In this paper, the heat transfer rate using nano-sized ferrofluid with and without magnetization is analysed using CFD simulation and compared with the experimental values obtained from a heat exchanger using water as base fluid. The heat transfer rate is measured using different combinations by varying the percentage of nano particles and by introduction of different magnetic intensity (gauss) on to the ferrofluid. The optimum heat transfer rate and efficiency of heat exchanger is calculated with the different combinations and the values are compared with the values of CFD simulation. CFD simulation was undertaken for water alone as cooling media and for water with ferro particle addition from 2% to 5%. The difference in temperature observed to be similar with experimental values. The deviation is within the acceptable limit and therefore the experimental findings are validated. The experiment was conducted on a parallel flow heat exchanger with water alone as cooling media, water with varying percentage of ferro fluid and water with varying magnetic intensity on ferrofluid. Percentage of ferro particles added up to where the optimum temperature difference could be obtained and the magnetic intensity also varied up to the optimum value.

CFD modelling on flow field characteristics of engine cooling water jacket and its cooling performance improvement based on coolant transport path analysis method

“…where k is turbulent kinetic energy, m 2 /s 2 ; and ε is turbulent dissipation rate, m 2 /s 3 ; The semi-implicit method for pressure-linked equation (SIMPLE) is applied to handle the pressure-velocity coupling for all numerical simulations. 52 The PRESTO method is chosen for pressure interpolation at control volume faces. The second-order upwind method is applied for the discretization of governing equations.…”

“…Through a general review about CFD application in flow field characteristics analysis of engine cooling water jacket, it shows that CFD technology has obvious advantages in predicting evaluation parameters for fluid flow characteristics (coolant flow velocity and flowrate distributions, HTC distribution). [32][33][34][35][36] Through the CFD results theoretically guide the design and optimization process, the improvement for achieving a well-cooled engine products can be obtained easily.…”

Computational investigations on port injected DEE in a biogas inducted HCCI engine

“…CFD analysis proves to be fruitful in the simulation of HCCI mixture preparation during the intake stroke. The heat transfer process during the momentum exchange under the wall boundary conditions presents an interesting study as explored by Rajesh and Jacob [21]. The shape deformation modelling and optimisation procedure was applied to a car engine air intake port using CFD solver Fluent [22], as explored in the present study.…”

Study of fluid flow inside closed cavities using computational numerical methods

“…In the current study, behavior of the temperature and velocity of fluid flowing inside the closed cavities with different boundary conditions is considered. The literature explains a vivid usage of the natural convection flow within the closed entities because of its practical relevance in various applications, such as heat exchangers [1] and [2], room heating and ventilation design [3][4][5], melting [6], etc., Different shapes of cavities, circle [7], trapezoid [8], square [9] and [10], triangle [11][12][13] has been grabbing the attention of researchers since decades. The non-dimensional governing equations of the 2D flow problem is formulated with the penalty finite element method.…”