We have investigated the motion of water flow through glass tubes of different shapes by calculating the value of the Reynolds number denoted as Re. We know that at a given flow rate the value of Re determines the type of flow being classified as laminar, transitional or tubulent. The dependence of Re in different configurations of glass tubes as well as on temperature is investigated. The apparatus for the experiment is designed in the undergraduate laboratory and the conventional method of measuring the flow rate using a dye for detecting the type of flow is used.