METHOD FOR ANALYZING HONEYCOMB STRUCTURE, AND PROGRAM AND ANALYSIS DEVICE FOR THE SAME

摘要

Object information representing a honeycomb structure with a plurality of meshes is obtained, and an inner-wall-surface heat transfer coefficient hs, i.e., a heat transfer coefficient between an inner wall surface of a cell and a fluid, is derived as follows. First, one of the meshes as a target for derivation of the inner-wall-surface heat transfer coefficient hs is set (S200), and a dimensionless coordinate X* is derived on the basis of position information (X-coordinate) of the set mesh and fluid state information (S210). An inner-wall-surface dimensionless heat transfer coefficient Nus corresponding to the derived dimensionless coordinate X* is then derived on the basis of the inner-wall-surface dimensionless correspondence information (S220 to S250). The inner-wall-surface heat transfer coefficient hs in the mesh set as the derivation target is then derived on the basis of the derived inner-wall-surface dimensionless heat transfer coefficient Nus (S260).

主权项

1. A method for analyzing a honeycomb structure that analyzes, on a honeycomb structure including walls forming a plurality of cells that serve as flow paths for a fluid, a state of the honeycomb structure after lapse of a predetermined time from an analysis start time when the honeycomb structure is exposed to the fluid, the method comprising:
an object information obtaining step of obtaining object information that simulates the honeycomb structure with a plurality of meshes involving wall meshes representing the walls and cell meshes representing the cells, the object information containing position information for each of the meshes; an inner-wall-surface dimensionless correspondence information obtaining step of obtaining inner-wall-surface dimensionless correspondence information that is information regarding a correspondence relation between a dimensionless coordinate, which is a dimensionless value indicating a position of the mesh, and an inner-wall-surface dimensionless heat transfer coefficient, which is a dimensionless value of an inner-wall-surface heat transfer coefficient representing a heat transfer coefficient between an inner wall surface of the cell and the fluid; an inner-wall-surface heat transfer coefficient deriving step of executing, at an arbitrary time from the analysis start time until lapse of the predetermined time, a process of setting, from among the plurality of meshes, the wall mesh and the cell mesh as a derivation target for which the inner-wall-surface heat transfer coefficient is to be derived, deriving the dimensionless coordinate on basis of both the position information of the set mesh and fluid state information regarding a state of the fluid in the set cell mesh at the relevant time, deriving the inner-wall-surface dimensionless heat transfer coefficient corresponding to the derived dimensionless coordinate on basis of the inner-wall-surface dimensionless correspondence information, and deriving the inner-wall-surface heat transfer coefficient between the set wall mesh and the set cell mesh on basis of the derived inner-wall-surface dimensionless heat transfer coefficient, and further executing the aforesaid process for the plural wall meshes and the plural cell meshes while the derivation target is changed from one to another; a heat transfer analysis step of executing, at an arbitrary time from the analysis start time until the lapse of the predetermined time, a heat transfer analysis including a process of deriving a heat transfer amount between the wall mesh and the cell mesh on basis of the inner-wall-surface heat transfer coefficient derived in the inner-wall-surface heat transfer coefficient deriving step, and deriving temperatures of the plural wall meshes and temperatures of the fluids in the plural cell meshes after lapse of a short time from the relevant time; and a temperature distribution deriving step of repeatedly executing the inner-wall-surface heat transfer coefficient deriving step and the heat transfer analysis step, and deriving respective temperatures of the plural wall meshes after the lapse of the predetermined time.