# 4. MFIX-DEM Code Verification Test Cases¶

The test cases presented in this chapter for the MFIX-DEM are summarized in Table 4.1. Test cases have been selected based on the criteria for verification test selection outlined in Section 1. All cases are executed in serial mode unless explicitly noted.

Table 4.1 Summary of MFiX-DEM tests by feature.

01

02

03

04

05

06

Frequency†

C

C

C

C

C

C

Reference Dataset‡

A

A

A

A

P

A

Dimension

1D

1D

1D

1D

2D

1D

Coupled

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Momentum

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Thermal Energy

Species Mass

Time-Stepping

Euler

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Spring-Dashpot

Linear

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Hertzian

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Collisions

Particle-particle

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Particle-wall

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$${\checkmark}$$

Friction

Particle-particle

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Particle-wall

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Distributed Memory

Shared Memory

† C-Incorporated into the continuous integration server; M-Monthly; Q-Quarterly; X-Manual; D-Disabled

‡ A-Analytical solution; P-Published benchmark data; R-Regression data from previous code versions