Ansys Fluent – Heat Transfer through a pipe

Written by cfd.ninja

March 10, 2020

Bookstore

Source: NASA

Thermodynamics is a branch of physics that deals with the energy and work of a system. Thermodynamics deals only with the large scale response of a system that we can observe and measure in experiments. In aerodynamics, we are most interested in the thermodynamics of propulsion systems and high speed flows.

The Zeroth Law of Thermodynamics introduces the concept of thermodynamic equilibrium, in which two objects have the same temperature. If we bring two objects that are initially at different temperatures into physical contact, they eventually achieve thermal equilibrium. During the process of reaching thermal equilibrium, heat is transferred between the objects. The amount of heat transferred delta Q is proportional to the temperature difference delta T between the objects and the heat capacity c of the object.

delta Q = c * delta T

The heat capacity is a constant that tells how much heat is added per unit temperature rise. The value of the constant is different for different materials. Heat is always transferred from the object at the higher temperature to the object with the lower temperature.

For a gas, the heat transfer is related to a change in temperature. The temperature, pressure, and volume of the gas determine the state of the gas. Heating a gas changes the state of the gas. But the state of a gas can be changed in a wide variety of ways. On another slide, we show how work done on a gas also changes the state of the gas. The amount of work that a gas can do depends on both the initial and final states and on the process used to make the change. In the same way, the amount of heat transferred in changing the state of a gas also depends on the initial and final states and the exact process used to change the state. Different processes result in different amounts of heat transfer and work. The effects of both heat flow and work are combined in the First Law of Thermodynamics.

There are some thermodynamic processes in which there is no heat transfer. Engineers call this type of a process an adiabatic process and there are simple equations which relate the pressure and temperature of a gas for an adiabatic process.

In this tutorial you will learn to simulate heat transfer through a pipe using Ansys Fluent. This is a very easy tutorial for beginners to use this tool.

We share the same tutorial using ANSYS CFX.

Related Articles

Ansys Fluent | Hydraulic Jump

Ansys Fluent | Hydraulic Jump

Free surface is the surface of a fluid that is subject to zero parallel shear stress, such as the interface between two homogeneous fluids, for example, liquid water and the air in the Earth's atmosphere. Unlike liquids, gases cannot form a free surface on their...

Stay Up to Date With The Latest News & Updates

Help us keep growing

CFD.NINJA is financed with its own resources, if you want to support us we will be grateful.

Join Our Newsletter

Subscribe to receive emails with detailed information related to the CFD.

Follow Us

Subscribe to our social networks to receive notifications about our new tutorials

Pin It on Pinterest

Shares

Share This

Share this post with your friends!

Advertisment ad adsense adlogger