shell and tube heat exchanger with staggered baffles (validation)
The simulation is based on a reference article “Numerical analysis and optimization on shell-side performances of shell and tube heat exchanger with staggered baffles” and its results are compared and validated with the results in the article.
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The present problem simulates the water flow inside a shell and tube heat exchanger. The simulation is based on a reference article “Numerical analysis and optimization on shell-side performances of shell and tube heat exchanger with staggered baffles” and its results are compared and validated with the results in the article. In this project, the water with temperature-dependent properties will enter the computational domain with an initial temperature of 293K and a velocity of 3.19m/s (referring to 4kg/s mass flow rate) and passes through staggered baffles and over the heated tubes with a temperature equal to 353K.
Shell and Tube Geometry & Mesh
The geometry of this project is designed in ANSYS design modeler and consists of several hot tubes and staggered baffles and is meshed in ANSYS meshing software. The mesh type used for this geometry is unstructured and the element number is 8031842.
Shell and Tube CFD Simulation Settings
The critical assumptions considered in this project are:
- Simulation is done using a pressure-based solver.
- The present simulation and its results are considered steady and do not change as a function of time.
- The effect of gravity has not been taken into account.
The applied settings are summarized in the following table.
|(shell and tube)||Models|
|near-wall treatment||standard wall function|
|(shell and tube)||Boundary conditions|
|Tube walls||Temperature||353 K|
|Shell wall||Heat flux||0 W/m2|
|(shell and tube)||Solution Methods|
|Momentum||second order upwind|
|Energy||second order upwind|
|turbulent kinetic energy||second order upwind|
|turbulent dissipation rate||second order upwind|
Paper Validation Results (Shell and Tube)
At the end of this simulation, the present work results are compared with results obtained by the paper. The diagram in Figure 18 was used for this purpose, which shows the changes in pressure drop over different mass flow rates for different staggered angles (beta). It should also be noted that we have validated the results for beta angle = 60 degrees and mass flow rate = 4 Kg/s.
|Paper’s results||CFD results||error|
|Pressure drop||200000 Pa||189384.758||5.3%|
All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, the Training File presents how to solve the problem and extract all desired results.