Information processing device, electronic apparatus, information processing method, and program

Patent metadata

Field	Value
Publication number	US-2019102355-A1
Application number	US-201716081530-A
Country	US
Kind code	A1
Filing date	Jan 30, 2017
Priority date	Mar 10, 2016
Publication date	Apr 4, 2019
Grant date	—

Abstract

To further reduce calculation load in flow analysis of a fluid in a cavity. Provided is an information processing device including: a division unit configured to divide a cavity in which a fluid flows into a plurality of infinitesimal elements; an adjustment unit configured to adjust an equation expressing a conservation law of a physical quantity related to the fluid, on a basis of distribution of a thickness of the cavity; and an analysis unit configured to calculate flow velocity for each of the infinitesimal elements by using the equation adjusted by the adjustment unit.

First claim

What is claimed is:

1 . An information processing device comprising:
a division unit configured to divide a cavity in which a fluid flows into a plurality of infinitesimal elements; an adjustment unit configured to adjust an equation expressing a conservation law of a physical quantity related to the fluid, on a basis of distribution of a thickness of the cavity; and an analysis unit configured to calculate flow velocity for each of the infinitesimal elements by using the equation adjusted by the adjustment unit.

2 . The information processing device according to claim 1 , wherein the adjustment unit performs adjustment corresponding to addition of a term obtained by multiplying an operand in a space derivative term of the equation by a space derivative of the thickness and an inverse of the thickness, to the equation.

3 . The information processing device according to claim 1 , wherein the adjustment unit performs adjustment corresponding to addition of a term obtained by multiplying an operand in a time derivative term of the equation by a time derivative of the thickness and an inverse of the thickness, to the equation.

4 . The information processing device according to claim 2 , wherein the adjustment unit performs the adjustment corresponding to the addition by replacing a space derivative operator

∂

∂
x

of the equation with an operator

D
Dx

defined by the following equation (1):

[

Math
.


1

]

D
Dx

=

∂

∂
x

+

1
h



(

∂
h

∂
x

)

,

(
1
)

where h is the thickness.

5 . The information processing device according to claim 3 , wherein the adjustment unit performs the adjustment corresponding to the addition by replacing a time derivative operator

∂

∂
t

of the equation with an operator

D
Dt

defined by the following equation (2):

[

Math
.


2

]

D
Dt

=

∂

∂
t

+

1
h



(

∂
h

∂
t

)

,

(
2
)

where h is the thickness.

6 . The information processing device according to claim 1 , wherein the equation includes an equation of continuity expressing a mass conservation law of the fluid and a Navier-Stokes equation of motion expressing a momentum conservation law of the fluid.

7 . The information processing device according to claim 6 , wherein the equation of continuity and the Navier-Stokes equation of motion include a term related to a source of the fluid.

8 . The information processing device according to claim 6 , wherein the Navier-Stokes equation of motion includes a term related to gravity applied to the fluid.

9 . The information processing device according to claim 6 , wherein the Navier-Stokes equation of motion includes a term related to flow resistance of the fluid.

10 . The information processing device according to claim 6 , wherein the Navier-Stokes equation of motion includes a term related to surface tension of the fluid.

11 . The information processing device according to claim 1 , wherein the adjustment unit performs adjustment of normalizing a term correlated with the thickness in the equation, by multiplying the term by an inverse of the thickness.

12 . The information processing device according to claim 1 , wherein the analysis unit calculates pressure for each of the infinitesimal elements.

13 . An electronic apparatus comprising
the information processing device according to claim 1 .

Assignees

• Sony Corp

Inventors

• Hirano Takaaki

Classifications

• G06F2111/10

  Numerical modelling · CPC title

• G06F17/13 Primary

  Differential equations (using digital differential analysers G06F7/64) · CPC title

• G01N11/06

  by timing the outflow of a known quantity · CPC title

• G01N11/08

  by measuring pressure required to produce a known flow · CPC title

• G06F30/23 Primary

  using finite element methods [FEM] or finite difference methods [FDM] · CPC title