[問題] 週期性空間內的彈性碰撞問題

看板Fortran作者rinb0919 (冷葉)時間13年前 (2011/11/04 20:03)推噓1(1推 0噓 2→)

留言3則, 2人參與討論串1/1

老師出了一個作業總共有8個步驟但我光是前4個步驟就寫了一個多禮拜... 剛剛發現我不懂第6步驟的意思附上題目想請各位幫我解釋一下題目在說甚麼希望有好心人士可以救救我......T_T 作業大致上是要在一個20x20的週期性邊界內(二維模擬2個等質量等半徑的圓進行彈性碰撞的結果 (1) To write a Hard-Sphere Molecular Dynamics simulation program, we start from: Step 1. Assume the system has only two spheres with the same mass and same size (r=1) in a periodic 2-D space that is 20 unit size by 20 unit size. The spheres initially stay at (1,1) and (5,5) with velocity (0.3, 0.4) and (-0.3,-0.4), respectively. Step 2. Write a code (subroutine) to read initial conditions of the system Step 3. Write a code (subroutine) to estimate the collision time Step 4. Write a code (subroutine) to advance the spheres to the collision point. Step 5. Write a code (subroutine) to perform collision (change velocity) **Step 6. Write a code (subroutine) to advance the spheres without collision for a small timestep=0.1 (step 4 and step 6 may combine together) Step 7. Assemble subroutines from Step 3 to Step 6 to form a Simple Hard-Sphere Molecular Dynamics simulation program 不知道是否適合在這裡問但因為這作業要用fortran寫所以希望各位可以幫我.... 不適合在此發問的話我會盡快刪文謝謝!! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.116.24.165