Analysis Stages & Orchestrators

These nodes form the top level of a Kratos case. An orchestrator drives one or more analysis stages, and each stage ties together the problem data, solver, processes and outputs for a single physics.

Orchestrators

Directory: public/js/nodes/orchestrators/

Node	Type	Purpose
Sequential Orchestrator	Orchestrators/SequentialOrchestrator	Runs stages one after another (execution_list). The default orchestrator injected by an analysis stage when none is connected.
Orchestrator (base)	Orchestrators/Base/Orchestrator	Base class for orchestrator nodes.

An analysis stage that has no orchestrator input automatically emits a default SequentialOrchestrator block, so a single stage is usable on its own.

Analysis stages

Directory: public/js/nodes/analysis_stages/

The base Analysis stage node (base/analysis_stage.js) defines the common inputs/outputs. Its inputs are:

Input	Slot type	Feeds
Stage	stage_flow	Chains additional stages into the same orchestrator.
Stage Pre	stage_pre	stage_preprocess block.
Stage Post	stage_post	stage_postprocess block.
Problem Data	problem_data	problem_data block.
Solver Settings	solver_settings	solver_settings block.
Processes	process_list	processes.boundary_conditions_process_list.
Output Processes	output_process_list	output_processes.output_process_list.

Outputs: Stage (stage_flow) and Name (string). On execute it builds the stages.<stage_name> entry and appends the stage to the orchestrator's execution_list.

Concrete stages

Node	Type
Structural Mechanics Analysis	Analysis stages/StructuralMechanicsAnalysis
Fluid Dynamics Analysis	Analysis stages/FluidDynamicsAnalysis
Convection Diffusion Analysis	Analysis stages/ConvectionDiffusionAnalysis
Potential Flow Analysis	Analysis stages/PotentialFlowAnalysis
FSI Analysis	Analysis stages/FsiAnalysis

Each sets its analysis_stage type string to the corresponding Kratos application module.

Components

Node	Type	Purpose
Problem Data	Analysis stages/Components/ProblemData	Emits the problem_data block: problem name, parallel type (OpenMP/MPI), echo level, start/end time.
Preprocess	Analysis stages/Components/Preprocess	stage_preprocess operations/modelers.
PostProcess	Analysis stages/Components/PostProcess	stage_postprocess operations.

The Problem Data node is the simplest way to see the tool in action — connect it to a JSON Viewer to inspect its output:

📖 Kratos reference: AnalysisStage