Validation test No. 1

The correctness of the code and the accuracy of the calculations of Microflow 3D v1.0 has been validated. For validation, we use a straight square channel test case. The test has been prepared with the view to verify the correctness of the pressure drop and velocity profile calculations at a laminar flow regime in a steady-state. For a detailed case study (scientific background, calculations, and results), please look into the test directory: /Data/Validation_tests/Case_MEDIUM_straight_square_channel/description/. There you can find several files: Test_description.pdf, Pressure_drop_calculations.ods, and Matlab's script square_profile_v2.m.

 Figure 1. Geometry and grid

Brief description of test results
Performance: 45.301 MLUPS run on 6 cores of 8-core Intel Core i9-9900K DDR4 3000 MT/s
Pressure drop relative mean error of calculations (PO from Delplace): 0.341660% at termination criteria of 0.1% mass flow error (inlet/outlet).
Velocity calculations, relative mean error at half-length of the channel: 0.10431% at termination criteria of 0.1% mass flow error (inlet/outlet).
Velocity calculations, the median value of relative error at half-length of the channel: 0.055629%.

Below, you can find the selected results of the analysis presented in figures 1-3.

Figure 1. Pressure drop along the channel and relative error of prediction

Figure 2. Distribution of relative simulation error

Figure 3. Comparison of algebraic and numerical solution of flow model. Red dots – results of simulation, surface – results of analytical solution