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Extending and Modifying LAMMPS Writing Your Own Source Code

You're reading from   Extending and Modifying LAMMPS Writing Your Own Source Code A pragmatic guide to extending LAMMPS as per custom simulation requirements

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Product type Paperback
Published in Feb 2021
Publisher Packt
ISBN-13 9781800562264
Length 394 pages
Edition 1st Edition
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Authors (2):
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Jichen Li Jichen Li
Author Profile Icon Jichen Li
Jichen Li
Dr. Shafat Mubin Dr. Shafat Mubin
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Dr. Shafat Mubin
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Toc

Table of Contents (21) Chapters Close

Preface 1. Section 1: Getting Started with LAMMPS
2. Chapter 1: MD Theory and Simulation Practices FREE CHAPTER 3. Chapter 2: LAMMPS Syntax and Source Code Hierarchy 4. Section 2: Understanding the Source Code Structure
5. Chapter 3: Source Code Structure and Stages of Execution 6. Chapter 4: Accessing Information by Variables, Arrays, and Methods 7. Chapter 5: Understanding Pair Styles 8. Chapter 6: Understanding Computes 9. Chapter 7: Understanding Fixes 10. Chapter 8: Exploring Supporting Classes 11. Section 3: Modifying the Source Code
12. Chapter 9: Modifying Pair Potentials 13. Chapter 10: Modifying Force Applications 14. Chapter 11: Modifying Thermostats 15. Assessments 16. Other Books You May Enjoy Appendix A: Building LAMMPS with CMake 1. Appendix B: Debugging Programs 2. Appendix C: Getting Familiar with MPI 3. Appendix D: Compatibility with Version 29Oct20

Summary

In this chapter, we examined computes that calculate a global quantity, identify interactions between groups, tally distances over ranges and perform tensor multiplications. These computes illustrate the scope of processing and computations that can be carried out by proper implementations inside the compute style source codes.

By reading this chapter, you understand that computes can calculate and return scalar and vector quantities when properly defined, and that neighbor lists can be implemented in computes by requesting and accessing them with a pointer. In addition, combining outputs from multiple cores is facilitated by the MPI_Allreduce() method.

In the next chapter, we will analyze selected fix styles that can perform a variety of operations on the simulated system during a simulation run.

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