Practice Finite Difference Method (FDM) - 19.10.1 | 19. Modelling – Membrane, Two-Dimensional Wave Equation | Mathematics (Civil Engineering -1)
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Practice Questions

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Question 1

Easy

What does the Finite Difference Method (FDM) help solve?

💡 Hint: Think about where analytical solutions might be challenging.

Question 2

Easy

Define the CFL Condition in your own words.

💡 Hint: Consider what happens if that condition is violated.

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Interactive Quizzes

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Question 1

What is the primary purpose of the Finite Difference Method?

  • To solve linear equations.
  • To approximate solutions to differential equations.
  • To create graphical representations of data.

💡 Hint: Think about what FDM is often applied to.

Question 2

True or False: The CFL condition is used to ensure the validity of numerical solutions.

  • True
  • False

💡 Hint: Consider stability aspects of numerical methods.

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Challenge Problems

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Question 1

Given a grid where Δx = 0.05 m, Δy = 0.05 m, and Δt = 0.01 s, derive the CFL condition parameters for a wave speed of 300 m/s. Determine if the condition is satisfied.

💡 Hint: Focus on calculating each part, ensuring you respect the parameters set.

Question 2

Apply the explicit finite difference method to find the displacement at the next time step for a given set of initial values un_i,j=2, un-1_i,j=1, un_i,j+1=3, and un_i,j-1=0. Define the neighboring contributions as well.

💡 Hint: Make sure to plug in all grid point values correctly and perform the appropriate calculations.

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