export declare const constants: {
    'R': number;
    'Pc': number;
    'MIN_P': number;
    'MAX_P': number;
    'MAX_T': number;
    'MIN_T': number;
    'MIN_S': number;
    'MIN_H': number;
    'R2_MIN_T': number;
    'R2_MAX_T': number;
    'R2_CRT_S': number;
    'R2_CRT_P': number;
    'B23_MIN_P': number;
    'B23_MAX_T': number;
    'R5_MIN_T': number;
    'R5_MAX_P': number;
    'R5_MAX_T': number;
    'R3_MIN_T': number;
    'R3_CRT_S': number;
    'B23_S_MIN': number;
    'B23_S_MAX': number;
    'B23_H_MIN': number;
    'B23_H_MAX': number;
};
export declare function CONST(key: string): any;
export declare function viscosity(T: any, ρ: any): number;
export declare function thermal_conductivity(T: any, ρ: any): number;
export declare function surface_tension(T: any): number;
export declare function dielectric_constant(T: any, ρ: any): number;
export declare function ionization_constant(T: any, ρ: any): number;