# Why is the force given in my program 100 times different from the force received by Calculix?

**URL:** <https://precice.discourse.group/t/why-is-the-force-given-in-my-program-100-times-different-from-the-force-received-by-calculix/1559>\
**Category:** Using preCICE\
**Tags:** adapters, calculix\
**Created:** [September 10, 2023, 5:07am UTC](https://precice.discourse.group/t/why-is-the-force-given-in-my-program-100-times-different-from-the-force-received-by-calculix/1559 "2023-09-10T05:07:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![fan\_wu](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/fan_wu/32/1855_2.png) [@fan\_wu](https://precice.discourse.group/u/fan_wu)\
**Post date:** [September 10, 2023, 5:07am UTC](https://precice.discourse.group/t/why-is-the-force-given-in-my-program-100-times-different-from-the-force-received-by-calculix/1559/1 "2023-09-10T05:07:53Z")

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Why is the force given in my program 100 times different from the force received by Calculix?  
In my program, a specific size of force was given, but when I looked at the calculus, I found that the forces on the nodes differed by 100 times, and the mapping method was nearest neighbor. Solid mesh and fluid mesh have the same size and size. The following are the code and results. May I ask the reason?

 ![image](https://global.discourse-cdn.com/free1/uploads/precice/original/2X/e/ec6199ddd2de532c9312632517b53f4a2078e466.png)  
 ![image](https://global.discourse-cdn.com/free1/uploads/precice/original/2X/f/f9b81e3e6cd99e313e9504735a88b8d4306944a8.jpeg)

I would greatly appreciate it if someone could answer

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**Author:** ![Makis](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/makis/32/25_2.png) [@Makis](https://precice.discourse.group/u/Makis)\
**Post date:** [October 2, 2023, 6:19pm UTC](https://precice.discourse.group/t/why-is-the-force-given-in-my-program-100-times-different-from-the-force-received-by-calculix/1559/2 "2023-10-02T18:19:29Z")

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Closing as duplicate of [Why is the force given in my program 100 times different from the force received by Calculix?](https://precice.discourse.group/t/why-is-the-force-given-in-my-program-100-times-different-from-the-force-received-by-calculix/1554)

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**Author:** ![Makis](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/makis/32/25_2.png) [@Makis](https://precice.discourse.group/u/Makis)\
**Post date:** [October 2, 2023, 6:19pm UTC](https://precice.discourse.group/t/why-is-the-force-given-in-my-program-100-times-different-from-the-force-received-by-calculix/1559/3 "2023-10-02T18:19:34Z")

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