Last updates for 2.9.0rc2

Author: momchil-flex

CHANGELOG.md

@@ -7,17 +7,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.9.0rc2] - 2025-07-17
+
 ### Added
 - Implemented `FreqRange` utility class for frequency/wavelength handling with constructor methods `from_freq_interval()`, `from_wavelength()`, and `from_wvl_interval()`. 
 - Add support for `np.unwrap` in `tidy3d.plugins.autograd`.
 - Add Nunley variant to germanium material library based on Nunley et al. 2016 data.
 - Add `PointDipole.sources_from_angles()` that constructs a list of `PointDipole` objects needed to emulate a dipole oriented at a user-provided set of polar and azimuthal angles.
 - Added `priority` parameter to `web.run()` and related functions to allow vGPU users to set task priority (1-10) in the queue.
 - `EMEFieldMonitor` now supports `interval_space`.
-- `Simulation.precision` option allows to select `"double"` precision for very high-accuracy results. Note that this is very rarely needed, and doubles the simulation computational weight and correpsondingly FlexCredit cost.
+- `Simulation.precision` option allows to select `"double"` precision for very high-accuracy results. Note that this is very rarely needed, and doubles the simulation computational weight and correspondingly FlexCredit cost.
 - Added material type `PMCMedium` for perfect magnetic conductor.
 - `ModeSimulation.plot()` method that plots the mode simulation plane by default, or the containing FDTD simulation if any of ``x``, ``y``, or ``z`` is passed. 
 - Enable singularity correction at PEC and lossy metal edges.
+- New `VolumeMesher` simulation type and associated `VolumeMeshMonitor` and `VolumeMesherData`, which can be used to run the unstructured meshing for a `HeatChargeSimulation` separately before running the solver.
 
 ### Changed
 - Switched to an analytical gradient calculation for spatially-varying pole-residue models (`CustomPoleResidue`).
@@ -43,6 +46,7 @@ with fewer layers than recommended.
 - `MonitorData.get_amplitude()` no longers multiplies by a factor of `1j` and now directly returns the complex value of the data.
 - `EMESimulationData.port_modes_tuple` is now symmetry-expanded.
 - Fixed `Medium2D` validation error message when invalid data is passed to `ss`.
+- The phase of the amplitudes of a `DiffractionMonitor` was correctly centered such that the origin is at the monitor center.
 
 ## [2.9.0rc1] - 2025-06-10
 
@@ -85,7 +89,7 @@ with fewer layers than recommended.
 - Upon initialization, an FDTD `Simulation` will now try to create all `ModeSolver` objects associated to `ModeSource`-s and `ModeMonitor`-s so they can be validated.
 - `tidy3d.plugins.autograd.interpolate_spline()` and `tidy3d.plugins.autograd.add_at()` can now be called with keyword arguments during tracing.
 - Zero-size dimensions automatically receive periodic boundary conditions instead of raising an error.
-- Set `ModeSpec` precision to `double` by deafult for more accurate mode solver results. Does not apply to `EMEModeSpec`, where the `auto` precision is still default for speed and cost.
+- Set `ModeSpec` precision to `double` by default for more accurate mode solver results. Does not apply to `EMEModeSpec`, where the `auto` precision is still default for speed and cost.
 
 ## [2.8.4] - 2025-05-15
 

docs/faq

@@ -377,7 +377,7 @@
         "min_edges_per_side": 2.0,
         "non_refined_structures": []
     },
-    "version": "2.9.0rc1",
+    "version": "2.9.0rc2",
     "plot_length_units": "\u03bcm",
     "structure_priority_mode": "equal",
     "analysis_spec": {

docs/notebooks

@@ -277,7 +277,7 @@
         "min_edges_per_side": 2.0,
         "non_refined_structures": []
     },
-    "version": "2.9.0rc1",
+    "version": "2.9.0rc2",
     "plot_length_units": "\u03bcm",
     "structure_priority_mode": "equal",
     "analysis_spec": null

tests/sims/full_charge.h5

@@ -616,6 +616,76 @@
                 }
             }
         },
+        {
+            "attrs": {},
+            "geometry": {
+                "attrs": {},
+                "type": "Box",
+                "center": [
+                    -1.0,
+                    0.0,
+                    0.0
+                ],
+                "size": [
+                    1.0,
+                    1.0,
+                    1.0
+                ]
+            },
+            "name": null,
+            "background_permittivity": null,
+            "background_medium": null,
+            "priority": null,
+            "type": "Structure",
+            "medium": {
+                "attrs": {},
+                "name": null,
+                "frequency_range": null,
+                "allow_gain": null,
+                "nonlinear_spec": null,
+                "modulation_spec": null,
+                "viz_spec": null,
+                "heat_spec": null,
+                "type": "AnisotropicMedium",
+                "xx": {
+                    "attrs": {},
+                    "name": "PMC",
+                    "frequency_range": null,
+                    "allow_gain": false,
+                    "nonlinear_spec": null,
+                    "modulation_spec": null,
+                    "viz_spec": null,
+                    "heat_spec": null,
+                    "type": "PMCMedium"
+                },
+                "yy": {
+                    "attrs": {},
+                    "name": null,
+                    "frequency_range": null,
+                    "allow_gain": false,
+                    "nonlinear_spec": null,
+                    "modulation_spec": null,
+                    "viz_spec": null,
+                    "heat_spec": null,
+                    "type": "Medium",
+                    "permittivity": 1.0,
+                    "conductivity": 0.0
+                },
+                "zz": {
+                    "attrs": {},
+                    "name": null,
+                    "frequency_range": null,
+                    "allow_gain": false,
+                    "nonlinear_spec": null,
+                    "modulation_spec": null,
+                    "viz_spec": null,
+                    "heat_spec": null,
+                    "type": "Medium",
+                    "permittivity": 1.0,
+                    "conductivity": 0.0
+                }
+            }
+        },
         {
             "attrs": {},
             "geometry": {
@@ -722,6 +792,39 @@
                 "type": "PECMedium"
             }
         },
+        {
+            "attrs": {},
+            "geometry": {
+                "attrs": {},
+                "type": "Box",
+                "center": [
+                    -1.0,
+                    0.0,
+                    0.0
+                ],
+                "size": [
+                    1.0,
+                    1.0,
+                    1.0
+                ]
+            },
+            "name": null,
+            "background_permittivity": null,
+            "background_medium": null,
+            "priority": null,
+            "type": "Structure",
+            "medium": {
+                "attrs": {},
+                "name": "PMC",
+                "frequency_range": null,
+                "allow_gain": false,
+                "nonlinear_spec": null,
+                "modulation_spec": null,
+                "viz_spec": null,
+                "heat_spec": null,
+                "type": "PMCMedium"
+            }
+        },
         {
             "attrs": {},
             "geometry": {
@@ -2028,7 +2131,7 @@
                 "offset": 5.0,
                 "remove_dc_component": true
             },
-            "num_freqs": 3,
+            "num_freqs": 1,
             "direction": "+",
             "angle_theta": 0.0,
             "angle_phi": 0.0,
@@ -2060,7 +2163,7 @@
                 "offset": 5.0,
                 "remove_dc_component": true
             },
-            "num_freqs": 3,
+            "num_freqs": 1,
             "direction": "+",
             "angle_theta": 0.0,
             "angle_phi": 0.0,
@@ -2170,7 +2273,7 @@
                 "offset": 5.0,
                 "remove_dc_component": true
             },
-            "num_freqs": 3,
+            "num_freqs": 1,
             "direction": "+",
             "angle_theta": 0.5235987755982988,
             "angle_phi": 0.6283185307179586,
@@ -3291,7 +3394,7 @@
         "layer_refinement_specs": [],
         "type": "GridSpec"
     },
-    "version": "2.9.0rc1",
+    "version": "2.9.0rc2",
     "plot_length_units": "\u03bcm",
     "structure_priority_mode": "equal",
     "lumped_elements": [
@@ -3364,6 +3467,7 @@
     "simulation_type": "tidy3d",
     "post_norm": 1.0,
     "courant": 0.8,
+    "precision": "hybrid",
     "normalize_index": 0,
     "shutoff": 0.0001,
     "run_time": 1e-12