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.
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Set up a particle tracking simulation
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Understanding particle tracking simulation
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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