/**
 * CSVExporter — Export simulation data as CSV for analysis in MATLAB, Python, Excel.
 *
 * Produces well-formed CSV with:
 * - Header row including unit annotations
 * - Consistent numeric formatting
 * - RFC 4180 compliant output
 */
import type { ConvergenceResult } from '../ConvergenceControl';
/**
 * Export solver convergence history as CSV.
 * Columns: iteration, residual_norm, max_change (if available)
 */
export declare function exportConvergenceHistory(result: ConvergenceResult, options?: {
    solverName?: string;
}): string;
export interface ScalarFieldCSVOptions {
    fieldName?: string;
    unit?: string;
}
/**
 * Export a 3D scalar field as CSV with spatial coordinates.
 * Columns: x, y, z, value
 */
export declare function exportScalarFieldCSV(nx: number, ny: number, nz: number, dx: number, dy: number, dz: number, data: Float32Array, options?: ScalarFieldCSVOptions): string;
/**
 * Export arbitrary tabular data as CSV.
 * Generic utility for material property tables, solver statistics, etc.
 */
export declare function exportTable(headers: string[], rows: (string | number)[][], options?: {
    comment?: string;
}): string;
export interface MaterialRow {
    name: string;
    conductivity: number;
    specific_heat: number;
    density: number;
    source: string;
}
/**
 * Export material property table as CSV with unit-annotated headers.
 */
export declare function exportMaterialTable(materials: MaterialRow[]): string;
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