Towel Warmer, ANSYS Fluent CFD Simulation Training
The present problem simulates a towel warmer using ANSYS Fluent software.
This product includes a Mesh file and a comprehensive Training Movie.
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The present problem simulates a towel warmer using ANSYS Fluent software. A towel warmer is considered a type of radiator used to dry towels in the bathroom, and is also responsible for heating the bathroom’s interior and is also considered a decorative element for the bathroom. How it works are not much different from a regular radiator; So that this device also supplies the hot water needed to create heating from the central engine room or package. Circulation of hot water in the pipes of this device warms the space and absorbs the environment’s humidity. The number of pipes used in this device will vary depending on the size of the interior of the desired bathroom. In this simulation, a towel warmer is designed in which water flows through several rows of pipes with a rectangular cross-section.
The water flow inside the towel warmer has a speed of 0.083 m.s-1 and a temperature of 317.15 K. Also, the pipe walls of this towel warmer have a thermal boundary condition of the type of heat transfer; So that the heat transfer coefficient is equal to 250 W.m-2.K-1 and the ambient airflow temperature is equal to 298.15 K.
Towel Warmer Geometry & Mesh
The present model is designed in three dimensions using Design Modeler software. The model is related to a towel warmer that has a radiator structure. The model is 32 cm long and 40 cm high; It consists of 34 rows of pipes with a rectangular cross-section.
We carry out the model’s meshing using ANSYS Meshing software. The mesh type is structured. The element number is 475344. The following figure shows the mesh.
Towel Warmer CFD Simulation
We consider several assumptions to simulate the present model:
- We perform a pressure-based solver.
- The simulation is steady.
- The gravity effect on the fluid is ignored.
The following table represents a summary of the defining steps of the problem and its solution:
|near wall treatment||realizable|
|velocity magnitude||0.083 m.s-1|
|gauge pressure||0 pascal|
|wall motion||stationary wall|
|heat transfer coefficient||250 W.m-2.K-1|
|free stream temperature||298.15 K|
|momentum||second order upwind|
|turbulent kinetic energy||first order upwind|
|turbulent dissipation rate||first order upwind|
|energy||second order upwind|
At the end of the solution process, two-dimensional and three-dimensional contours related to pressure, velocity, temperature, vortex viscosity and turbulence kinetic energy are obtained. The contours show that the water flows inside the towel warmer transfers heat to its surroundings. As a result, the water temperature inside the towel warmer decreases from the inlet to the outlet.
A Mesh file and a comprehensive Training Movie present how to solve the problem and extract all desired results.