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Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal > Workflow for thermal and flow analyses > Particle tracking

Particle impact and pass-through reports

The flow solver generates a ParticleAndImpactTrackingSummary.dat file which contains:

  • The Particle Tracking Summary table

  • The Particle Surface Impact and Screen Pass-Through Tracking Report tableThe software generates this table when you request a particle impact report in the Flow Surface simulation object or a pass-through report in the Screen simulation object.

Particle Tracking Summary table

 Particle Tracking Summary =========================   +----------------------+-----------+---------------+------------+---------------+ |  Injection Surface   |  Number   | Proportion of |    Mass    | Proportion of | |                      |  Injected | Total Number  |  Injected  |  Total Mass   | |                      |           |   Injected    |            |   Injected    | +----------------------+-----------+---------------+------------+---------------+ | Site_Inj_1           | Num_Inj_1 |    Prop_Inj_1 | Mass_Inj_1 |   PropM_Inj_1 | | ...                  |       ... |           ... |        ... |           ... | | Site_Inj_N           | Num_Inj_N |    Prop_Inj_N | Mass_Inj_N |   PropM_Inj_N | +----------------------+-----------+---------------+------------+---------------+ | TOTAL                |   Tot_Inj |         1.000 |   TotM_Inj | Tot_PropM_Inj | +----------------------+-----------+---------------+------------+---------------+ |  Ejection Boundary   |  Number   | Proportion of |    Mass    | Proportion of | |                      |  Ejected  | Total Number  |   Ejected  |  Total Mass   | |                      |           |    Ejected    |            |    Ejected    | +----------------------+-----------+---------------+------------+---------------+ | Site_Ejc_1           | Num_Ejc_1 |    Prop_Ejc_1 | Mass_Ejc_1 |   PropM_Ejc_1 | | ...                  |       ... |           ... |        ... |           ... | | Site_Ejc_M           | Num_Ejc_M |    Prop_Ejc_M | Mass_Ejc_M |   PropM_Ejc_M | +----------------------+-----------+---------------+------------+---------------+ | TOTAL                |   Tot_Ejc |         1.000 |   TotM_Ejc | Tot_PropM_Ejc | +----------------------+-----------+---------------+------------+---------------+

The above report corresponds to a model with N injections sites and M ejection sites.

  • Site_Inj_I is the specified particle injection simulation object name for site I.

  • Site_Ejc_J is the specified name of the flow boundary condition simulation object of type opening or outlet for site J preceded by either OPENING or OUTLET.

  • Num_Inj_I and Num_Ejc_J are the total number of particles injected at site I and ejected at site J over the duration of the simulation.

  • Prop_Inj_I and Prop_Ejc_J are the proportion of particles injected from site I and ejected at site J over the duration of the simulation.

  • Mass_Inj_I and Mass_Ejc_J are the total mass of particles injected from site I and ejected at site J over the duration of the simulation.

  • PropM_Inj_I and PropM_Ejc_J are the proportion of particle mass injected from site I and ejected at site J over the duration of the simulation.

  • Tot_Inj and Tot_Ejc are the total number of particles injected and ejected at all sites over the duration of the simulation.

  • TotM_Inj and TotM_Ejc are the total mass of particles injected and ejected at all sites over the duration of the simulation.

  • Tot_PropM_Inj and Tot_PropM_Ejc are the total proportion of particle mass injected and ejected at all sites over the duration of the simulation.

Particle Surface Impact and Screen Pass-Through Tracking Report table

Particle Surface Impact and Screen Pass-Through Tracking Report===============================================================  +-------------------+--------–---–----+----------+---------------+--------------+| Injection Surface | Impact Surface  |  Number  |   Number of   |    Impact    ||                   |                 | Injected |    Impacts    |  Probability |+-------------------+--------–---–----+----------+---------------+--------------+| Site_1            |   Surface_1     |Num_Inj_1 | Num_Imp_1_1   |  P_Imp_1_1   || ...               |    ...          |      ... |         ...   |        ...   || Site_1            |   Surface_L     |Num_Inj_1 | Num_Imp_1_L   |  P_Imp_1_L   || ...               |    ...          |      ... |         ...   |        ...   || Site_N            |   Surface_L     |Num_Inj_N | Num_Imp_N_L   |  P_Imp_N_L   |+-------------------+--------–---–----+----------+---------------+--------------+| Injection Surface | Tracking Screen |  Number  |   Number of   | Pass-Through ||                   |                 | Injected | Pass-Throughs | Probability  |+-------------------+--------–---–----+----------+---------------+--------------+| Site_1            |    Screen_1     |Num_Inj_1 | Num_Pass_1_1  |  P_Pass_1_1  || ...               |      ...        |      ... |         ...   |         ...  || Site_1            |    Screen_M     |Num_Inj_1 | Num_Pass_1_M  |  P_Pass_1_M  || ...               |      ...        |      ... |         ...   |         ...  || Site_N            |    Screen_M     |Num_Inj_N | Num_Pass_N_M  |  P_Pass_N_M  |+-------------------+--------–---–----+----------+---------------+--------------+

The above report corresponds to a model with N injections sites, L tracking flow surfaces, and M tracking screens.

  • Site_I is the specified particle injection simulation object name for site I.

  • Surface_J is the specified simulation object name of the tracking flow surface J.

  • Screen_K is the specified simulation object name of the tracking screen K.

  • Num_Inj_I is the total number of particles injected at site I over the duration of the simulation.

  • Num_Imp_I_J is the number of unique particles injected from site I which impact the tracking flow surface J.

  • Num_Pass_I_K is the number of unique particles injected from site I which pass through tracking screen K.

  • P_Imp_I_J is the impact probability defined by P_Imp_I_J = Num_Imp_I_J/Num_Inj_I.

  • P_Pass_I_K is the pass-through probability defined by P_Pass_I_K = Num_Pass_I_K/Num_Inj_I.

How do I

Set up a particle tracking simulation

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Understanding particle tracking simulation

ParaView output files

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Particle impact and pass-through reports, Simcenter 3D 2021.1 Series

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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/xid855445 · retrieved 2026-07-17