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When we create a rectangle in ANSYS in the geometry step, we are not affecting the
mathematical model.
A) True
B) False
Give this one a try later!
, B) False
There are three elements needed to define a boundary value problem:
1. Governing equations
2. Domain
3. Boundary conditions
The rectangle in ANSYS defines the domain. Hence we are affecting the
boundary value problem (i.e. the mathematical model) when we create the
rectangle in ANSYS.
Reaction
Select the true statement.
Our finite-element solution satisfies energy conservation for:
A) Each infinitesimal element, each finite element and the entire bar
B) Each finite element and the entire bar but not for each infinitesimal element
C) The entire bar but not for each infinitesimal or finite element
Give this one a try later!
C) The entire bar but not for each infinitesimal or finite element
Energy is conserved only in aggregate in the FE solution. In this example, it is
satisfied exactly for the bar. In more complex examples, the aggregate energy
IMBALANCE will not be zero. But it should be small for your finite-element
solution to be valid. That's an important way to check how good is your finite
element solution.
Material Assignment
, Remember to assign the correct material to the part before solving! Consider the
following components of the mathematical model:
a. Governing equations
b. Essential boundary conditions
c. Natural boundary conditions
Which of these is/are affected when you assign the material to the part?
A) (a) only
B) (a) and (b)
C) (a) and (c)
D) (a), (b), and (c)
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C) (a) and (c)
There is only one material property in this problem: thermal conductivity k
which appears in the governing equation as well as the natural boundary
conditions. It doesn't drop out of the governing equation because we have a
non-zero heat generation Q. It appears in the natural boundary conditions
also. For instance, at the right boundary, we have qx=−k(∂T∂x).
Temperature Values
Our mesh has 8 nodes and 3 elements. How many temperature values are we asking the
ANSYS solver to determine directly?
Note this is not the same as asking how many equations ANSYS needs to solve. Please
input your answer as an integer (e.g. 1, or 5, or 14, etc.).
Give this one a try later!
When we create a rectangle in ANSYS in the geometry step, we are not affecting the
mathematical model.
A) True
B) False
Give this one a try later!
, B) False
There are three elements needed to define a boundary value problem:
1. Governing equations
2. Domain
3. Boundary conditions
The rectangle in ANSYS defines the domain. Hence we are affecting the
boundary value problem (i.e. the mathematical model) when we create the
rectangle in ANSYS.
Reaction
Select the true statement.
Our finite-element solution satisfies energy conservation for:
A) Each infinitesimal element, each finite element and the entire bar
B) Each finite element and the entire bar but not for each infinitesimal element
C) The entire bar but not for each infinitesimal or finite element
Give this one a try later!
C) The entire bar but not for each infinitesimal or finite element
Energy is conserved only in aggregate in the FE solution. In this example, it is
satisfied exactly for the bar. In more complex examples, the aggregate energy
IMBALANCE will not be zero. But it should be small for your finite-element
solution to be valid. That's an important way to check how good is your finite
element solution.
Material Assignment
, Remember to assign the correct material to the part before solving! Consider the
following components of the mathematical model:
a. Governing equations
b. Essential boundary conditions
c. Natural boundary conditions
Which of these is/are affected when you assign the material to the part?
A) (a) only
B) (a) and (b)
C) (a) and (c)
D) (a), (b), and (c)
Give this one a try later!
C) (a) and (c)
There is only one material property in this problem: thermal conductivity k
which appears in the governing equation as well as the natural boundary
conditions. It doesn't drop out of the governing equation because we have a
non-zero heat generation Q. It appears in the natural boundary conditions
also. For instance, at the right boundary, we have qx=−k(∂T∂x).
Temperature Values
Our mesh has 8 nodes and 3 elements. How many temperature values are we asking the
ANSYS solver to determine directly?
Note this is not the same as asking how many equations ANSYS needs to solve. Please
input your answer as an integer (e.g. 1, or 5, or 14, etc.).
Give this one a try later!
