报告题目：Modeling and simulation of nanofluid flow and heat transfer
报告人：DR. RIZWAN UL HAQ
报告时间： 2019年1月17日 下午 13:00-16:00;
报告摘要：In this presentation I would like to present some fundamental definition of fluid dynamics and its types along with the heat transfer concept due to its wide range of industrial applications. All the flow and heat transfer models ae based upon momentum and energy equation, respectively. Since there are many working fluid at the industrial level which have poor thermal conductivity. So, based upon deficiency in heat transfer, nanoparticles are incorporated to enhance the thermal conductivity of working fluid. Various kind of nanofluids model are also under consideration. The expressions for nanofluid are related with the nanoparticles and base fluid, therefore five major characteristics are defined in the form of: density, dynamic viscosity, thermal expansion coefficient, specific heat and thermal conductivity. Even there are various kind of expression for effective thermal conductivity expression, which are based upon shape of nanoparticle. All the said expressions are incorporated with momentum and energy equation of given fluid model. Since this model is in the form of coupled nonlinear system of differential equation, therefore solutions of these equations are determined by appropriate analytical or numerical technique. Now situation arises when the conditions are defined at the surface of the given model. These conditions must be arising in the various form, for instance: for cavity or channel or peristaltic motion (bounded domain) and on the other hand if conditions are defined for boundary layer phenomenon (semi-infinite domain). Results are obtained for velocity, temperature, skin friction and Nusselt number. Through results we can observed the behaviour of both base fluid and nanofluid. Even results are comparable for various kind of effective thermal conductivities.
报告人简介：DR. RIZWAN UL HAQ, the Assistant Professor of Department of Electrical Engineering, Bahria University. His research field is about Fluid Dynamics, nanofluid, heat transfer, numerical analysis, Boundary layer flow, Cavity flow models, channel flow, Peristaltic flow, Homotopy analysis method, Optimal Homotopy analysis method, Adomian Decomposition method, Finite difference method, shooting technique, Finite element method.