Can the example system avoid being disturbed by the clock?

1. A concise explanation of the problem you're experiencing.

Through the particle system I did a simulation of the effects of wind movements. Its source code is similar to the official snowing example( But with the clock, it will be affected. Particle animation becomes very fast and particles stop after the time is over. The official snowing example is also affected. Can the particle system avoid the influence of clock?

2. A minimal code example. If you've found a bug, this helps us reproduce and repair it.

      var start = Cesium.JulianDate.fromDate(new Date(2018, 2, 22, 16));
        var stop = Cesium.JulianDate.addSeconds(start, 1500, new Cesium.JulianDate());
        viewer.clock.startTime = start.clone();
        viewer.clock.stopTime = stop.clone();
        viewer.clock.currentTime = start.clone();
        viewer.clock.clockRange = Cesium.ClockRange.CLAMPED;
        viewer.clock.multiplier = 100;
        viewer.timeline.zoomTo(start, stop);

3. Context. Why do you need to do this? We might know a better way to accomplish your goal.

4. The Cesium version you're using, your operating system and browser.

Hi there,

Thing in Cesium like animations and simulations are tied to the time. In the update function the second parameter dt is the change in time. You can scale your updates according to that value to make the particles move at the rate you’d like. However, if simulation time is not advancing, the particles will not update.