The Design – Heat Exchanger (Shell and Tube) Simulation | ANSYS CFX
One of the common types of converters is a shell-tube heat exchanger. In terms of the number of shell and tube passes, these converters have different types. Typically, the pores that are installed cause turbulence and the creation of a component of the transverse velocity in the flow, therefore the displacement coefficient of the fluid in the shell side increases.
In these heat exchangers, the shell and the tube have a baffle (flow-guide plates), the flow of the shell side has an intersection with the tubes at the adjacent baffles, and while moving from the distance between the one baffles to the next, the flow moves Parallel with tubes.
In this project, an attempt has been made to simulate and analyze a shell-tube heat exchanger using Ansys CFX software.
Geometry & Grid
The geometry required for this analysis was generated by Ansys Design Modeler software. The meshing required for this analysis was also generated by Ansys Meshing software. The mesh type used in this analysis is unstructured. The total number of volume properties for shell & tube geometry is 3.8364e+008 mm³.
In this analysis, a total energy analysis type was used to obtain the results to check the fluid flow. In this analysis, buoyant models have been used and stationary domain motion has also been activated in this analysis. In this analysis, a k-Epsilon model was used to study the water flow and thermal energy fluid models of heat transfer.
The cold flow input for this geometry of a shell-tube heat exchanger directs the flow of water at a fluid temperature of 12 C into the geometry. The hot flow input for this geometry of a shell-tube heat exchanger directs the flow of water at a fluid temperature of 62 C into the geometry. The turbulence boundary condition of a shell-tube heat exchanger wall is considered to be k-Epsilon according to the working conditions. Wall function is defined as Scalable in the name selection section of turbulence boundary condition.
Discretization of Equations
Due to the type of heat transfer in this analysis, a First Order is used to solve the turbulence numerics. An RMS residual type has been used for convergence criteria with a residual target equal to 1.E-4.
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