D. Michiko M. Noor, Haniah, Ikha Magdalena
This paper studies the cooling of coffee phenomena using a first-order linear ordinary differential equation (ODE). There are two models that we propose to investigate this phenomenon. We solve the models analytically to obtain the evolution of the temperature as a function of time. Some numerical simulations are presented by solving the model numerically using the Euler and Heun methods. Moreover, the numerical simulations will be applied to adjust a constant parameter of proportionality of the model that will be suitable for the primary data collected from self-experimentation. The result from the first model shows that the coffee temperature decreases to 0°C as a stable, steady state. Meanwhile, the second model simulation shows similar behavior towards room temperature, which is also the only equilibrium point. In addition, RMSEs for the Euler and Heun methods are used to examine the accuracy of both techniques, and we conclude that the Heun method gives a better approach than the Euler. © 2022 Author(s).
Departement of Mathematics, Institut Teknologi Sumatera, Lampung, Indonesia; Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Bandung, Indonesia
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