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errmsg

Timestamp:: Jan 20, 2020 1:55:15 PM (5 years ago)
Author:: suehring
Comment:: --

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doc/app/errmsg

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 ||[=#PA0312 PA0312]   ||Time step has reached minimum limit. \\dt = ... s Simulation is terminated.\\old_dt = ... s\\dt_u = ... s\\dt_v = ... s\\dt_w = ... s\\dt_diff = ... s\\u_max = ... m/s k=... j=... i=...\\v_max = ... m/s k=... j=... i=...\\w_max = ... m/s k=... j=... i=...   ||The time step is determined according to the CFL criterion to assure a stable numerical solution. This error message means that the required minimum time step, determined from the three velocity components, is several orders of magnitude smaller than [../d3par#dt_max dt_max], or, in other words, that at least one of the velocity components got too large. Due to the large number of complex reasons it should be noted that this list is not complete, but it is intended to give general hints how to proceed in case of this error message. First, check for a unrealistic value of [../d3par#dt_max dt_max] in the NAMELIST file. Moreover, this error message may indicate for unrealistic settings of e.g. [../inipar#bc boundary conditions] or other NAMELIST parameters. For very small vertical grid spacing [../inipar#dz dz] this error might also occur if [../inipar#roughness_length roughness_length] >= [../inipar#dz dz]. Please also check if this error appears if you run without USERCODE. To compile and run the PALM and USERCODE with DEBUG-options might also give sometimes valuable hints.
 To be continued.||
 ||[=#PA0313 PA0313]   ||Resolved plant-canopy is defined on top of an artificially created building grid point (emerged from the filering) - LAD profile is omitted at this grid point: (i,j) = ... ||Due to numerical reasons one-grid point cavities in topography are filtered, so that building geometries might be changed on this scale. In case tall canopy is directly adjacent to the building before, it may happen that building and plant canopy overlap after the filtering. In order to avoid that LAD is mistakenly mapped on top of buildings, which may significantly affect the downstream flow and radiation properties, LAD profiles are ommitted at these artificially-created building grid points. ||
+||[=#PA0313 PA0313]   ||Resolved plant-canopy is defined on top of an artificially created building grid point (emerged from the filering) - LAD profile is omitted at this grid point ||Due to numerical reasons one-grid point cavities in topography are filtered, so that building geometries might be changed on this scale. In case tall canopy is directly adjacent to the building before, it may happen that building and plant canopy overlap after the filtering. In order to avoid that LAD is mistakenly mapped on top of buildings, which may significantly affect the downstream flow and radiation properties, LAD profiles are ommitted at these artificially-created building grid points. ||
 ||[=#PA0314 PA0314]   ||External radiation forcing does not cover the entire simulation time. || ||
 ||[=#PA0315 PA0315]   ||In case of external radiation forcing a dynamic input file is required. If no dynamic input for the child domain(s) is provided, at least one for the root domain is needed. || ||
 …
 ||[=#PA0501 PA0501]   || turbulent inflow/outflow is not yet implemented for RANS mode || Setting [wiki:doc/app/inipar#turbulent_inflow turbulent_inflow] or [wiki:doc/app/inipar#turbulent_outflow turbulent_outflow] is not allowed in RANS mode (see namelist parameter [wiki:doc/app/inipar#turbulence_closure turbulence_closure] to switch between LES/RANS mode). ||
 ||[=#PA0502 PA0502]   || RANS mode is still in development! Not all features of PALM are yet compatible with RANS mode. Use at own risk! || As the RANS mode is a relatively new feature in PALM, not all available features are yet tested in combination with the RANS mode. It might be possible that some combinations will not work and the simulation crashes (see namelist parameter [wiki:doc/app/inipar#turbulence_closure turbulence_closure] to switch between LES/RANS mode). ||
 ||[=#PA0503 PA0503]   || z0 exceeds surface-layer height at horizontal/vertical natural/urban surface and is decreased appropriately at grid point (i,j) = ... || In PALM, Monin-Obukhov similarity is assumed between the surface and the first computational grid point normal to the surface. Because of the staggered grid, the distance between these two points is half of the grid spacing in the respective direction, i.e. dz/2 in vertical direction. The height z = dz/2 defines the top of the (analytical) logarithmic layer zs, which is called the surface layer height here. Now functions like {{{ln(zs/z0)}}}, where z0 is the roughness length, are used to calculate characteristic surface layer variables like u* or theta*. This mathematically requires that {{{zs > z0}}}, or in other words, that {{{z0 < dz/2}}}. In case you have run into this error, you either need to reduce the roughness length z0 or increase the grid spacing dz. ||
+||[=#PA0503 PA0503]   || z0 exceeds surface-layer height at horizontal/vertical natural/urban surface and is decreased appropriately || In PALM, Monin-Obukhov similarity is assumed between the surface and the first computational grid point normal to the surface. Because of the staggered grid, the distance between these two points is half of the grid spacing in the respective direction, i.e. dz/2 in vertical direction. The height z = dz/2 defines the top of the (analytical) logarithmic layer zs, which is called the surface layer height here. Now functions like {{{ln(zs/z0)}}}, where z0 is the roughness length, are used to calculate characteristic surface layer variables like u* or theta*. This mathematically requires that {{{zs > z0}}}, or in other words, that {{{z0 < dz/2}}}. In case you have run into this error, you either need to reduce the roughness length z0 or increase the grid spacing dz. ||
 ||[=#PA0505 PA0505]   || Terrain height was internally shifted downwards by ... meter(s) to save computational resources. || Lowest terrain height in model domain is referenced to zero. In case of a nested run, the lowest terrain height is the lowest height among all parent and child domains. Different offset values would lead to edges between the child-parent domain boundaries. \\ '''Important:''' You need to shift the respective heights of cross sections and masked output manually, if this informative message appears. ||
 ||[=#PA0507 PA0507]   || z0h exceeds surface-layer height at horizontal/vertical natural/urban surface and is decreased appropriately at grid point (i,j) = ... || See [wiki:doc/app/errmsg#PA0503 error PA0503] for detailed explanation. ||
 ||[=#PA0508 PA0508]   || z0 exceeds surface-layer height at sea surface and is decreased appropriately at grid point (i,j) = ... || See [wiki:doc/app/errmsg#PA0503 error PA0503] for detailed explanation. ||
+||[=#PA0507 PA0507]   || z0h exceeds surface-layer height at horizontal/vertical natural/urban surface and is decreased appropriately || See [wiki:doc/app/errmsg#PA0503 error PA0503] for detailed explanation. ||
+||[=#PA0508 PA0508]   || z0 exceeds surface-layer height at sea surface and is decreased appropriately || See [wiki:doc/app/errmsg#PA0503 error PA0503] for detailed explanation. ||
 ||[=#PA0509 PA0509]   || salinityflux must not be set for ocean run without salinity || You have set parameters {{{top_salinityflux}}} or/and {{{bottom_salinityflux}}} to a non-zero value, and simulataneously switched off the salinity equation. Remove either the flux settings from your parameter file, or set {{{salinity = .TRUE.}}} ||
 ||[=#PA0510 PA0510]   || ocean mode not allowed for nesting || Nesting is not available for the ocean mode. ||