Hamza Khamis Kombo

Name: Hamza Khamis Kombo
NPM: 2306259553
Mechanical Engineering- S2

                   The First class Notes 1 (29/10/2024)

Conscious Thinking Heartware-Brainware (variable), Initiator, Intention, Initial Thinking, Idealization, Instruction. DAI5 is a problem solving method developed by Dr. Ahmad Indra from the University of Indonesia. This method is known as "Conscious Thinking" and focuses on the thinking process starting from intention to selecting tools as the final step. DAI5 is a concept that integrates heartware and brainware aspects to form conscious and focused thought patterns and attitudes. This approach uses five core variables which are expected to create balance between the mind, heart and human actions. The following is an explanation of these five variables. Initiator: refers to the initial trigger or impulse that starts the thought or action process. This initiator is the main source of energy or motivation that triggers a person to start a certain idea, project, or action. In the context of DAI5, this initiator may arise from within oneself, such as needs, values, or desires, or from outside, such as opportunities or challenges faced. Intention: is the clarity of the purpose of the action or thought that you want to realize. This intention is very important because it gives direction and meaning to the process of thinking or acting. With strong and positive intentions, individuals can undergo the next process with stable focus and motivation. Intention is a bridge between internal desires and the goals to be achieved. Initial Thinking: The Initial Thinking is the stage where initial ideas and possibilities are formulated. Here, individuals begin to map out thoughts, consider options, and explore different perspectives. This initial thought becomes the foundation for planning the next steps. At this stage, a person also learns to recognize obstacles, opportunities, and resources needed to achieve goals. Idealization: is the process of forming an ideal image or vision of the final result you want to achieve. In this stage, individuals imagine the desired results and set standards or ideal values ​​that they want to realize. Idealization helps someone to focus on the best potential of the expected results and maintain enthusiasm and perseverance in achieving them. Instruction set: This is the final stage, where specific direction or guidance begins to be implemented to achieve the goal. These can be concrete steps, strategies, or established methods to achieve an idealized vision. Instruction functions as a blueprint that guides actions until the final result is achieved. conclusion: These five variables, Initiator, Intention, Initial Thinking, Idealization, and Instruction are interrelated and form a structured conscious thinking process. DAI5 Conscious Thinking aims to create a thought pattern that is in harmony between the heart and brain, resulting in effective, meaningful and responsible actions. This approach is highly relevant for increasing self-awareness and decision quality, especially in personal and professional development.

         Heat pipes are efficient devices for heat transfer, often involving phase change. The basic heat conduction equation for a 1D system, known as Fourier’s law, can be described by the PDE:

  ∂𝑇/∂𝑡 =𝛼.∂2𝑇/∂𝑥2  where: T is the temperature, t is time, x is the spatial coordinate along the pipe length,
     𝛼=𝑘/𝜌c  is the thermal diffusivity, with  k being thermal conductivity, 𝜌 the density, and  c the specific heat.Heat Pipe Modifications
    In a heat pipe, we also consider phase change dynamics and latent heat. Therefore, an additional term for latent heat  needs to be incorporated, leading to:

∂𝑇/∂𝑡=𝛼.∂2𝑇/∂𝑥2+𝐿∂𝑚/pc∂𝑡. where ∂𝑚/∂𝑡 represents the phase change rate (e.g., vaporization and condensation along the pipe length).The algorithm to solve this heat pipe equation typically involves: Initialize Parameters: Set the initial temperature distribution, thermal properties (thermal diffusivity, latent heat, etc.), and boundary conditions. Discretize the PDE: Apply finite difference discretization (e.g., Forward-Time Centered-Space scheme) to convert the continuous PDE into a system of algebraic equations. Iterate Over Time Steps: Calculate temperature at each spatial node using the discretized equation. Update the temperature field based on the phase change rate term. Check for Convergence or Completion: Continue until a steady-state or a predefined number of time steps is reached.

Here's a simplified flowchart for the heat pipe simulation:

  Start
  Initialize Parameters
  Set Initial Conditions
    For Each Time Step: Calculate the heat transfer rate for each spatial node.

Update temperature with phase change term. Check Convergence: If converged, end simulation; else, continue. End

Python Code

The following code implements a simple finite difference solution to this heat transfer equation with an added phase change term

   import numpy as np
   import matplotlib.pyplot as plt# Constants

L = 1.0 # Length of the heat pipe (m) T_initial = 300 # Initial temperature (K) alpha = 1e-5 # Thermal diffusivity (m^2/s) L_heat = 200000 # Latent heat of phase change (J/kg) rho = 1000 # Density (kg/m^3) c = 1000 # Specific heat (J/(kg*K)) dx = 0.01 # Spatial step (m) dt = 0.1 # Time step (s) nx = int(L / dx) # Number of spatial points nt = 500 # Number of time steps

1. Initialize temperature field

T = np.full(nx, T_initial) T_new = T.copy()

1. Boundary conditions

T[0] = 400 # Left boundary (hot) T[-1] = 300 # Right boundary (cold)

1. Heat equation solver with phase change term

for t in range(nt):

   for i in range(1, nx - 1):
       phase_change = L_heat / (rho * c) * (T[i] > 373)  # Phase change at 373 K
       T_new[i] = T[i] + alpha * dt / dx**2 * (T[i+1] - 2*T[i] + T[i-1]) + phase_change # Update temperature T = T_new.copy()

1. Plotting the final temperature distribution

plt.plot(np.linspace(0, L, nx), T) plt.xlabel('Position along pipe (m)') plt.ylabel('Temperature (K)') plt.title('Temperature Distribution in Heat Pipe') plt.show(). This code approximates the heat transfer along a 1D heat pipe, including a basic model for phase change. Adjustments in the code (like boundary conditions, number of iterations, or temperature limits) can help refine the simulation based on specific heat pipe properties. This solution provides a straight forward foundation, but additional refinements may include more precise boundary handling, variable thermal properties, or more complex phase change models.(https://chatgpt.com/c/67288205-50f0-8008-90d8-b8cca45d8287)

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