Holiday Änglaspel: the Math behind the Music


So in the hope of more interest of the physics behind,

I did this simulation using AcuSolve in mind.

With videos and 3D models I now hope

my children and all else will see the full scope.


These Christmas ornaments reflect a combination of tradition and inventiveness that always fascinated me as a young child. It was almost a ceremonial experience to assemble all the brass pieces and see the mechanism come to life when you lit the candles.

An Änglaspel (eng. Christmas chime) traditionally has four candles, 1 rotor (FSI) RidigBodyMotion, and chimes.

Every Christmas holiday when it’s that time to bring out the Änglaspel I try to explain to my children the physics behind it, how the candles heats the air and creates a updraft, powering the elfs to rotate and (excluded from this simulation) the elf’s clappers hits the bells to creates a southing ringing sound. Which propagates throughout the house and create a wonderful holiday feeling for all. The feeling is there, but the physics behind it is usually ignored by the children.


Erik Magnemark

Erik Magnemark

Application Specialist at Altair Sweden
Erik Magnemark

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