10 Journal of Mechanical Engineering Research | Volume 02 | Issue 01 | March 2019 Distributed under creative commons license 4.0 DOI: https://doi.org/ 10.30564/jmer.v2i1.508 Journal of Mechanical Engineering Research http://ojs.bilpublishing.com/index.php/jmer ARTICLE Modeling of Flow Field and Heat Transfer in a Swimming Pool Abdelkader Doudou 1,2 1 ESE, OLMAN-RL, Mohammed First University 2 Polydisciplinary Faculty of Nador, BP 300, 62700 Selouane, Morocco. Corresponding: a.doudou@ump.ac.ma ARTICLE INFO ABSTRACT Article history Received: 28 January 2019 Accepted: 21 February 2019 Published Online: 12 March 2019 Heating swimming pools in an effcient and ecological way has become mandatory for the protection of the environment, but also for technologi- cal development and energy saving. The heating must maintain the quali- ty of bathing water, avoiding temperature variations between the different depths and locations of the pool. There are currently several types of heating systems for swimming pool water among which we can mention; heat pumps, gas heating and electrical resistance, etc. All of these systems are very expensive and voracious in energy consumption. However, solar thermal heaters can be a good solution because they are inexpensive and environmentally friendly. The purpose of this work is to use the COM- SOL MultiPhysics software to model the distribution of the flow field velocity and the temperature distribution according to the design of the pool and the infow and outfow of water and climatic conditions in the province of Nador, in northeastern Morocco. Keywords: Flow feld Velocity Temperature Simulation Swimming pool Heat transfer Energy *Corresponding Author: M D Email: 1. Introduction S cientists and engineers around the world are work- ing together to find (1) new strategies to reduce energy demand, (2) smart methods of securing sup- ply, (3) techniques to increase energy effciency, (4) new renewable energies to replace the fossil energies that are harmful for the environment and human health. But right now, applying thermal solar energy and reducing energy consumption are the two effciency ways to reduce energy costs and to preserve the environment from pollution [1] . Thus, the energy demand for heating is important, as for the swimming pools. The flow field in the pools depends on the number, the form and positions of the water inlets and outlets, the geometric shape of the pool and the feed fow rate. Cur- rently, there is no universal regulation on the design of pools. The International Swimming Federation (FINA) has imposed only geometries of 25 m x 15 m x 1.6 m for regional competitions and 50 m x 21 m x 1.8 m for national and international competitions [2] , without spec- ifying anything about entries and exits of water. When a competition is going to take place, the organizers demand that the water does not move and that the temperature is uniform throughout the pool. In fact, swimming pools can be used for different purposes: refreshing, recreational and learning swimming, training and competition, or for therapeutic purposes, all with different water temperature requirements. The average temperature for a comfortable swim is 27°C, although it can vary by 5°C according to